KR20140033935A - Apparatus for heating a tube - Google Patents

Abstract

The present invention relates to a thermoforming device for a shrinkable tube and, more specifically, to a thermoforming device for a shrinkable tube capable of arranging a plurality of shielding lines at the right position on a holding frame and covering the shielding lines with a shrinkable tube in bulk using a heating unit which supports sliding motion. The thermoforming device for a shrinkable tube which covers a shielding line including a connection hole at one end with a shrinkable tube includes: a main body frame which has a space unit with an open top at one side; a holding frame which has a hole in the central part to be connected to the space unit, includes a fixing unit to fix each side of the shielding line to which the shrinkable tube is inserted, and is combined to the main body frame; a pair of heating units which include a heating means and are placed to the top and the bottom of the central part of the holding frame through entrance to the inside/outside of the main body frame; and a driving unit which is placed inside the main body frame and moves the heating units to the inside/outside of the main body frame.

Description

TECHNICAL FIELD [0001] The present invention relates to a thermoforming apparatus for a shrink tube,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thermoforming apparatus for a shrinkable tube, and more particularly, to a thermoforming apparatus for a shrinkable tube, in which a plurality of shielding lines or wires are aligned on a mounting frame, heat is applied through a sliding portion, To a thermoforming apparatus for a shrink tube.

Generally, the shielding wires and wires used in automobiles are individually insulated by wires installed in the vehicle body for lighting and charging of automobiles, or are covered with a plurality of strands of wires together in a terminal, and are simply and neatly bundled electric wires .

The shielding wire and the electric wire are connected to an electric device, a protector, a fuse box, etc. installed in the vehicle, and serve to supply and operate an electric signal or power transmitted from the control unit. It is common for these shields and wires to have conductors with currents in the center and surround the conductors with insulators. However, electromagnetic waves are emitted from such electric wires, and noise is generated because electromagnetic waves penetrate into electric wires from the outside.

Therefore, in order to prevent the noise as described above, a conductive layer for shielding is formed on the conductor of the electric wire, and a shielding line coated with an insulating layer is developed and used to reduce the risk of electric shock.

These shielding wires and wires are shrinkable tubes that shrink when heat is applied to protect the coated wires or cables. That is, when heat is applied to the shrink tube after inserting a shrink tube having a diameter larger than that of the shield wire or the electric wire, the shrink tube is contracted and closely attached to the circumferential surface of the shield wire or the electric wire.

Conventionally, such covering work of the shrink tube is performed manually by a worker after inserting a shrink tube into a shielding wire or a wire and then molding the same using a separate heating tool. Accordingly, since the shrink tube work is manually formed by the operator, the workability is remarkably reduced and the safety of the worker in the heating process is threatened.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problems, and it is an object of the present invention to provide a method of manufacturing a shrinkable tube, in which a shrinking tube is fixed on a mounting frame, And to provide a thermoforming apparatus for a shrink tube which can be carried out.

Another object of the present invention is to provide a thermoforming apparatus for a shrinking tube capable of reducing the rate of defects by moving a heating part in a state in which a shielding line or a wire having a shrinking tube fitted therein is fixed at an accurate position.

It is another object of the present invention to provide a thermoforming apparatus for a shrinkable tube capable of obtaining a uniform shrinking effect by injecting air through a nozzle portion in a shrinking process of a shrinking tube.

According to an aspect of the present invention, there is provided a thermoforming apparatus for heating a shrinking tube and a shrink tube inserted in an electric wire, the apparatus comprising: a body frame having a space open at one side thereof; A stationary frame coupled to the main body frame, the stationary frame having a central portion communicating with the space portion and having a plurality of shielding lines and a plurality of shielding lines, A pair of heating units provided with heating means for providing heat and providing heat to the shielding line fixed to the mounting frame or to the side of the shielding line or the shrinking tube sandwiched by the electric wire, And driving means for reciprocating a pair of heating portions such that the pair of heating portions are positioned above and below the mounting frame.

Preferably, the fixing portion is composed of a first fixing portion and a second fixing portion arranged on the upper surface of the mounting frame at a predetermined interval, and may fix both sides of the shielding wire or the electric wire having the shrinking tube inserted therein.

Preferably, the first fixing portion is formed to have a plurality of fixing pieces that are elastically deformed by being protruded upward by a predetermined height, so that the middle of the length of the shielding wire or the wire is inserted between the pair of fixing pieces, The fixing part may be provided with a protrusion having a predetermined height so that a connection hole of a terminal provided at one end of the shield wire or the electric wire can be inserted.

Preferably, the first fixing part and the second fixing part are provided with a plurality of protruding pieces spaced apart at regular intervals, and the shielding wire or the electric wire is inserted and fixed in a spacing space formed between the protruding pieces have.

Preferably, the pair of heating units may further include a protective cover to prevent the heating unit from being exposed to the outside.

Preferably, the heating portion disposed on the upper portion of the pair of heating portions may be provided with a double protective cover in which the protective cover is spaced apart by a predetermined distance via a spacing member.

Preferably, the heating means may be provided with an infrared heater.

Preferably, the driving means may be a pneumatic cylinder.

Preferably, the stationary frame is provided with a nozzle portion having a plurality of injection holes formed therein, the nozzle portion being disposed at a central portion of the stationary frame so as to be perpendicular to the longitudinal direction of the shielding wire or electric wire fixed by the stationary portion, It can be sprayed toward the tube side.

According to the present invention as described above, the shrinking tube can be simultaneously shrunk by fixing the shielding line or the shrinking tube sandwiched by the electric wire on the mounting frame and moving the heating part toward the shrinking tube side to heat the shrinking tube at the same time, .

In addition, the present invention has the effect of increasing the reliability of a product by reducing the defective rate by applying heat to the shielding line or wire where the shrinking tube is inserted, and moving the heating part to the correct position.

Furthermore, the present invention can achieve a uniform shrinking effect by injecting air through the nozzle portion in the shrinking process of the shrinkable tube.

1 is a perspective view showing a thermoforming apparatus for a shrink tube according to a first embodiment of the present invention;
Figure 2 is a plan view and side view of Figure 1;
3 schematically shows a heating unit and a driving unit according to the present invention.
4 is a view showing an operating state of a thermoforming apparatus for a shrink tube according to the present invention.
5 is a perspective view showing a thermoforming apparatus for a shrink tube according to a second embodiment of the present invention;

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

In order to facilitate understanding of the present invention, the same reference numerals will be used to denote the same constituent elements even if they are shown in different drawings.

1 to 5, the thermoforming apparatus 100 and 200 for a shrink tube according to a preferred embodiment of the present invention includes a main body frame 110, a mounting frame 120, heating units 130a and 130b, .

1 and 5, the main body frame 110 has an outer shape so as to allow the heating units 130a and 130b and the driving means to be installed therein. As shown in FIGS. 1 and 5, A space portion 111 is provided.

That is, the driving unit is installed in the internal space, and the pair of heating units 130a and 130b are driven by moving plates 143 spaced apart from each other in the height direction, So that it can be moved upward and downward of the stationary frame 120. Here, the pair of the heating units can be appropriately set in the separation distance according to the product.

A control panel (not shown) including a power switch, a start switch, a timer, a heating lamp, a temperature display window, and a power lamp is provided at one side of the main body frame 110 to allow the operator to operate the heating units 130a and 130b, The power is supplied to the means and driven so that the operator can easily recognize the operating state during the operation.

The mounting frames 120 and 220 are coupled to the open upper side of the space 111 so that a shielding wire or a wire 101 having the shrinkage tube 104 inserted therein can be mounted. The stationary frames 120 and 220 are plate-shaped frames formed so that the central portions 121 and 221 communicate with the space portion 111, respectively. The stationary frames 120 and 220 are formed in a plate shape so as to fix shielding wires or electric wires to both sides of the central portions 121 and 221, A fixing portion and a second fixing portion.

Here, the center portions 121 and 221 provide a space in which the shrink tube 104 is disposed in a state where the shrink tube 104 is sandwiched between the shield wire and the wire 101. That is, when both end portions of the shielding wire and the electric wire 101 are fixed by the first fixing portion and the second fixing portion, the shielding line and the electric wire portion in which the shrinking tube 104 is fitted are disposed at the central portions 121 and 221 of the mounting frame. Accordingly, the shielding line and the wire portion in which the shrink tube 104 is inserted are heated by a pair of the heating portions 130a and 130b, which are moved upward and downward of the mounting frames 120 and 220, Thereby covering the shielding wire or the wire.

Here, the first fixing part and the second fixing part fixing the both ends of the shield wire and the electric wire may be provided in various forms.

1 and 2, the first fixing part may include a plurality of fixing pieces 122a and 122b elastically deformed to protrude upward from the upper surface of the mounting frame 120 by a predetermined height, So as to elastically press the middle of the length of the shield wire or the wire inserted between the pair of fixing pieces. Accordingly, when the shielding wire or the wire is inserted between a pair of fixing pieces 122a and 122b having a pair of middle lengths, the pair of fixing pieces 122a and 122b pivotally contact the shielding wire or the wire And the position is fixed by pressing. A plurality of first fixing portions 122 are provided on the upper surface of the mounting frame 120 so that a plurality of shielding lines or electric wires 101 can be fixed at the same time.

The second fixing portion is disposed on the opposite side of the center portion 121 so as to correspond to the first fixing portion and has a protrusion 123a protruding upward at a predetermined height so that a portion of the terminal 102 coupled to the shielding line can be fixed. ). In this case, a connection hole 103 is formed in the terminal 102, and the connection hole 103 is fixed to the protrusion 123a.

In this way, both ends of the shielding wire 101 and the wire 101 are fixed so that the shielding wire 101 and the shrinking tube 104 sandwiched by the wire are positioned at the central portion 121 of the mounting frame 120, The heating sections 130a and 130b are moved upward and downward to apply heat to the shrink tube 104, thereby covering the shrink tube.

Meanwhile, the second fixing portion may be provided such that a plurality of fixing pieces elastically deformed are paired with each other like the first fixing portion.

As shown in FIG. 5, the first fixing part and the second fixing part are provided with a plurality of protruding pieces 224 spaced apart from each other by a predetermined distance on the upper surface of the mounting frame, And may be provided in a manner to be inserted and fixed in a spacing space formed between neighboring protruding pieces 224. [

The heating units 130a and 130b are reciprocated toward the stationary frames 120 and 220 by the driving unit to provide heat to the shrinkable tube 104 side mounted on the central portions 121 and 221 of the stationary frames 120 and 220. These heating units are provided in pairs such that they are spaced apart by a certain distance in the upward and downward directions. The heating unit 130a disposed in the upper portion of the pair of heating units 130a and 130b is moved to the upper side of the mounting frames 120 and 220 to apply heat to the upper portion of the shrinking tube 104, The heating unit 130b disposed at the lower portion is moved to the lower portion of the mounting frames 120 and 220 to apply heat to the lower portion of the shrink tube 104. [ The pair of heating portions 130a and 130b are coupled to the movable plate 143 which is reciprocated along the cylinder rod 142 by the cylinder 141. [

Accordingly, when the movable plate 143 is operated by the cylinder 141, the pair of heating units 130a and 130b are reciprocally moved together with the movable plate 143, and when the shrink tube 104 is molded, And is disposed on the upper and lower portions of the frames 120 and 220. When the molding is completed, the frame 120 is moved in a direction away from the stationary frames 120 and 220 and returned to the original position.

The pair of heating portions 130a and 130b includes a heating means 131 for providing heat for forming the shrink tube 104 and a pair of heating means 131 for surrounding the heating means 131 to prevent the provided heat from being discharged to the outside. And a protective cover 132, one side of which is fixed to the movable plate 143, respectively. In this case, the heating means 131 may be an electric heating element such as an electric heating element, a coil wire, a heater rod, or an infrared heater. However, in order to uniformly heat shrink the tube 104 in a short time, And arranged so as to blow heated hot air to the heater rods.

The heating unit 130a disposed on the upper part of the mounting frames 120 and 220 through the movement of the pair of heating units 130a and 130b may be provided with a double protection cover 132. [

That is, the heating unit 130b disposed at the lower one of the pair of heating units 130a and 130b is positioned below the mounting frames 120 and 220 and is not exposed to the outside, It is positioned on the upper part of the mounting frames 120 and 220 and exposed to the outside. Accordingly, when the user touches the protective cover of the upper heating part 130a, which is exposed to the outside, the user may be burnt. To prevent this, the protective cover 132 of the heating part 130a disposed on the upper side is composed of the inner protective cover 132a and the outer protective cover 132b, and is connected to the inner protective cover 132b by the spacing member 133, A buffer space is formed between the outer protective cover 132a and the outer protective cover 132b. Accordingly, the heat generated by the heating means 131 is double-blocked by the inner protective cover 132a and the outer protective cover 132b, thereby reducing the risk of the operator's body contacting the protective cover 132, And the internal heat heated by the heater rods is prevented from being discharged to the outside, so that a warming effect can be obtained.

The driving unit receives the power and moves the pair of heating units 130a and 130b toward the mounting frames 120 and 220. [ 3, the movable plate 143 is connected to a pair of the heating units 130a and 130b. The movable plate 143 is connected to the cylinder rod 141 142 so as to reciprocate linearly.

Accordingly, when the movable plate 143 is moved to the left along the cylinder rod 142 by the cylinder 141, the pair of heating units 130a and 130b are positioned on the upper and lower sides of the mounting frames 120 and 220 (See FIG. 4B). When the molding is completed, the cylinder 141 is operated to move the movable plate 143 to the right side, whereby the molded shielding wire or the electric wire (not shown) 101 can be taken out and replaced with a shield line to be molded (see Fig. 4A).

Meanwhile, in the thermoforming apparatus for a shrink tube according to the present invention, cooling air is sprayed toward the shrinking tube side so that the shrinking tube can be shrunk rapidly and uniformly in the process of providing heat to the shrinking tube by the pair of heating sections It is possible. For this, the mounting frame 220 is provided with a nozzle unit 150 having a plurality of injection holes 152 formed therein. The nozzle unit 150 is disposed in the central portion 121 of the mounting frame 120 such that the nozzle unit 150 is perpendicular to the longitudinal direction of the shielding wire fixed at both ends by the first fixing unit and the second fixing unit.

Here, the nozzle unit 150 is connected to a separate air pump (not shown) to receive cooling air from the air pump.

According to the present invention as described above, the shrinking tube fitted to the shielding line is fixed on the mounting frame, and the heating part is moved to the shrinking tube side and heated, so that the shrinking operation of the shrinking tube can be simultaneously carried out, have.

In addition, the present invention has the effect of increasing the reliability of the product by reducing the defective rate by applying the heat to the shielding line in which the shrink tube is inserted at the correct position and moving the heating part.

Furthermore, the present invention can achieve a uniform shrinking effect by injecting air through the nozzle portion in the shrinking process of the shrinkable tube.

While the foregoing is directed in detail to a particular embodiment of the invention with reference to the drawings, it is not intended to limit the invention to this specific construction. It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the following claims. It is to be expressly understood, however, that equivalents, equivalents, replacements, and modifications through such simple design variations or modifications are expressly included within the scope of the present invention.

100,200: Thermoforming device for shrink tube
101: shield wire or wire 102: terminal
103: connecting hole 104: shrinking tube
110: main body frame 111:
120, 220: mounting frame 121, 221:
122a, 122b: Fixing piece 123a:
224: projecting pieces 130a, 130b:
131: heating means 132: protective cover
132a: inner protective cover 132b: outer protective cover
133: spacing member 141: cylinder
142: cylinder rod 143: movable plate
150: nozzle unit 152: injection hole

Claims (9)

A thermoforming apparatus for heating a shielding line or a shrinking tube fitted to an electric wire,
A body frame having a space portion opened at one side thereof;
A stationary frame coupled to the main body frame, the stationary frame having a central portion communicating with the space portion and having a plurality of shielding lines and a plurality of shielding lines,
A pair of heating units provided with heating means for providing heat and providing heat to the shielding line fixed to the mounting frame or to the side of the shielding line or the shrinking tube sandwiched by the electric wire, And
And a driving means for reciprocating the pair of heating parts such that the pair of heating parts are positioned above and below the mounting frame. The method of claim 1,
Wherein the fixing part comprises a first fixing part and a second fixing part arranged on the upper surface of the mounting frame at a predetermined interval and fixing both sides of the shielding wire or the electric wire having the shrinking tube inserted therebetween, . 3. The method of claim 2,
The first fixing part is formed to have a plurality of fixing pieces which are elastically deformed by being protruded upward at a predetermined height so that the middle of the length of the shielding wire or the wire is inserted between the pair of fixing pieces, And a protruding portion having a predetermined height so that a connection hole of a terminal provided at one end of the wire or the wire can be inserted. 3. The method of claim 2,
Wherein the first fixing part and the second fixing part are provided with a plurality of protruding pieces spaced apart at a predetermined interval and the shielding line or the electric wire is inserted and fixed in a spacing space formed between the protruded pieces, Thermoforming apparatus for tubes. The method of claim 1,
The pair of heating parts is a thermoforming device for a shrink tube, characterized in that the protective cover is further provided to prevent the heating means from being exposed to the outside. The method of claim 1,
Wherein the heating unit disposed at an upper portion of the pair of heating units is provided with a double protective cover in which a protective cover is spaced apart at a predetermined interval via a spacing member. The method of claim 1,
Wherein the heating means is an infrared heater. The method of claim 1,
Wherein the driving means is a pneumatic cylinder. The method of claim 1,
The stationary frame is provided with a nozzle portion having a plurality of injection holes formed therein at a central portion of the stationary frame so as to be perpendicular to the longitudinal direction of the shielding line or the electric wire fixed by the stationary portion so that the air provided by the pneumatic pump is sprayed toward the shrinking tube And a thermoforming apparatus for a shrink tube.

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