KR900001844Y1 - Pressing dies for coating and moulding busbar - Google Patents

Abstract

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Description

Busbar Coating Molding Extrusion Dies

1 is an exploded perspective view of the present invention.

2 is a perspective view of the present invention.

3 is a cross-sectional view taken along line A-A 'of the present invention.

4 is a partial cross-sectional view of the image cut by the air suction of the present invention.

* Explanation of symbols for main parts of the drawings

1: lower holder 5: lower core

13: lower pedestal 24: injector

28: vacuum nozzle

The present invention relates to an extrusion die that can be a PVC insulation coating on the high-voltage cable (Al, Cu) used in substations.

In the conventional high-voltage substation used in the substation, a method in which an insulator is wound around a wire plate or a more advanced technical method has been developed in which a resin concentrated as heat on a die is extruded and coated together with an externally inserted busbar. In the above method, the resin is accumulated inside the outlet through which the concentrated resin is brought into contact with the busbar and the resin flows backward, and the material and thickness to be coated cannot be changed, so that a constant coating layer cannot be maintained.

In addition, since the core is severely deformed and external air enters, bubbles are generated in the coating layer.

The present invention is to improve the problems of the PVC insulation coating method of the conventional high-voltage wire board as described above, based on the accompanying drawings as follows.

As shown in FIG. 1, the core fixing recess 2 and the engaging protrusion 3 are formed on the upper surface of the lower stand 1, and the injector fixing portion 4a is laid out on the front surface.

The sub-bar (5) is formed on the sub-bar insertion groove (6), the upper core coupling recess (7) and the shaped air suction path (8) and the vertical air suction hole (9) on the mold air suction path (8) and Horizontal air suction hole 10 is connected to the air inlet (11) on the right side of the magnetic air suction path (8) to form a forming portion 12 inclined to the lower portion of the lower core (5).

A core coupling recess 15 including a support protrusion 14 and a coupling end portion 16 are formed at both ends, and a resin inflow passage 17 is formed on the left side of the lower pedestal 13 and a resin inflow passage ( 17) After shaving the upper wall to form the pressure wall 18 and the blocking part 19, the penetrating part of the inlet fixing part 4b is placed on the front side and penetrates through the lower resin inflow path 17 of the blocking part 19, and the molding machine is fixed on the right side. The groove 20 is formed.

The upper stator 21 forms the coupling end 3 'on the lower surface and the injector fixing portion 4c on the front surface in contrast to the lower stator 1, and the upper core 22 and the upper pedestal 23 likewise have The core coupling attachment 7 'and the coupling convex portion 16', the resin inflow path 17, the pressure wall 18 'blocking portion 19' and the injection path fixing portion 44 are shown.

After forming the lower, the upper stand (1) (21), the upper core fixing recesses (2) (2 '), the lower core (5) (22), respectively, after attaching the half stand protrusion of the lower pedestal (13) (14) by mounting the lower core (5) on the surface, the day support (1) and the lower support (13) is bolted and fixed, the upper part on the engaging projection (3) and the core coupling recess (7) of the lower support (1) The core 22 is fitted with the coupling end 3 'and the core coupling convex portion 7' of the upper fixing bracket 21, and then fixed by bolts.

In addition, the upper coupling end 16 of the lower pedestal 13 to match the coupling convex portion 16 'of the upper base 23 is coupled and fixed with bolts.

The injector 24 is coupled to the injector fixing portions 4a, 4b, 4c, and 4d of the upper and lower holders 21 and 1 and the upper and lower pedestals 23 and 13, which are combined as described above. The upper and lower fixtures 21 and 1 are formed by fastening the bolt 26 and the connecting plate 27 on which the molding tool 25 is formed on the right fixing portion 20 of the lower pedestal 23 and 13 by bolting. The vacuum nozzle 28 is fixed to the horizontal air suction holes 10 and 10 'which are arranged around the left side of the sub-bar insert grooves 6 and 6'. Referring to the operation and effect of the present invention is configured as described as follows.

As shown in FIGS. 1 and 3, the secondary bar is inserted into the secondary bar insertion groove 6, 6 'on the left side and concentrated by heat through the injector 24 shown in FIG. When the resin is injected, the resin is extruded from the interlocking passages of the resin inlets 17 and 17 'and the pressure is increased through the interdigitated gaps of the pressure units 18 and 18'. (13) (23) The pressing bar was pressed to a certain thickness between the forming part 12 and the forming tool (taper face) after passing through the gap between the inner surfaces of the forming part 12, and the pressing bar was extruded through another flow path (internally-squeezed bar insertion groove). Outside, it is apply | coated outside the dice of this invention. At this time, the application method is that the breakthrough bar is extruded in contact with the projection surface 11 'of the air suction unit 11 of the core 5, 22, so that the air between the inside of the extruded resin and the outside of the breakthrough bar is air inlet 11 8) and the vacuum nozzle 28 connected to the air suction holes 11 and 10 ', and the vacuum pump is connected and pulled out in a vacuum operation while being closely adhered to the surface of the breaker.

Since the blocking portions 19 and 19 'are flush with the sides of the pedestals 13 and 23, the concentrated resins to be injected are guided only to the inflow passages 17 and 17', and the outer surfaces of the cores 5 and 22 are exposed. Extrude only.

In addition, the molding sphere 25 is related to the thickness of the secondary bar inserted into the secondary bar insertion groove 6 by adjusting the upper, lower, left and right bolts 29a to 29f separately from the secondary bar insertion groove 6. A coating layer of constant thickness is formed without.

In addition, since the flow path is separate, it has the advantage of making the thickness of the nose funky about five times than the existing die in proportion to the pressure, and occurs in the conventional method by preheating and inserting the same temperature as the die temperature when inserting the bushing bar from the outside. It is designed to remove the bubble phenomenon.

Claims (1)

In the extrusion die composed of upper and lower pairs, a layer is formed on the right side of the upper and lower cores 22 and 5 to form the inclined forming portion 12 and the upper surface of the lower core 5 (the lower surface of the upper core) The air suction passage 8 of the type and the sub-bar insertion groove 6 and the air suction passage 11 is formed on the right side of the air suction passage 8 and the vertical air suction hole on the air suction passage 8 is formed. 9) are formed by interconnecting the horizontal air suction hole 10, the core coupling recess in which the support protrusions 14 protrude from the upper surface and left side (lower surface and left side in the upper support) of the lower pedestal 13 ( 15) and the resin inflow passage 17, the pressure wall 18, the blocking portion 19 of the type and formed by coupling the pair of upper and lower stators 21 (1) pedestal (23) (13) After fixing the molding machine 26 having the molding tool 25 formed on the right side of the pedestal 23, 13, and the core 5, 22 projections, the flow paths (inner and outer core) with different busbars and resins are fixed. By extrusion as incidental bar coating extrusion die of the coating adhesion to the vacuum action through the air intake from outside the die.