JPH05283305A - Wire embedded powder molder - Google Patents

Abstract

PURPOSE:To prevent a wire from being exposed from an angular and thin powder molding when a wire is embedded in the molding. CONSTITUTION:In a cutting roll component constituted of a roll plate 17 with a lower blade 16 located between an upper punch 1 and a dice 2 arranged on the lower blade 16 and an upper blade 19 counter to the roll plate 17, when the lower blade 16 and the upper blade 19 are engaged horizontally to cut a wire C, the upper blade 19 and the roll plate 17 compress the wire C simultaneously to reduce the width of the wire C. Next, the rolling part of this wire C is embedded in powder A. This process allows rolling of the part of the wire C equivalent to an embedding length; therefore, in the case of molding a molding product having a width about the same as that of the wire C diameter, the embedded wire C is not exposed from the outer wall, so that a high- quality product can be obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire burying powder molding apparatus, and more particularly to a wire burying powder molding apparatus for burying a wire in a compact and thin shaped molding.

[0002]

2. Description of the Related Art In a conventional wire-embedded powder molding apparatus, as shown in FIG.
Is performed using an upper punch 1, a die 2 and a lower punch 3 which are formed by drilling along the axis. First, the upper punch 1
Is at the position of the top dead center, and the wire C having a length corresponding to the amount to be embedded in the molded body B is led out from the wire supply hole 1a of the upper punch 1. Further, the lower punch 3 inserts the upper portion of the lower punch 3 into a hole (hereinafter referred to as a die hole) 2a of the die 2 and forms a powder filling hole in a gap formed between the die hole 2a and the upper end surface of the lower punch 3. Is forming. Next, the powder A previously stored in the powder supply box 4 which is cylindrical and slidable on the die 2a is filled in the powder filling hole (FIG. 4A).
Next, the powder supply box 4 is slid and retracted from above the die hole 2a, and then the upper punch 1 and the wire C are lowered to insert the wire C into the powder A and at the same time into the die hole 2a. The upper punch 1 is inserted and the powder A is compressed from the upper surface. At the same time, the lower punch 3 rises to compress the powder A from the lower surface and to a desired size to form a molded body B in which the wire C is embedded (FIG. 4B).

Next, the upper punch 1 is raised to the top dead center, and the lower blade 16 and the upper blade 19 for cutting the wire are horizontally moved to cut the wire C into a desired length (see FIG. 4).
(C)).

Next, the wire C is punched by the length of the upper punch 1
After pulling back with leaving more, the upper surface of the lower punch 3 is dice 2
And the molded body B is discharged. This completes one step of powder molding.

[0005]

The conventional wire-embedded powder molding apparatus as described above, when processing a molded body having a square shape and a width similar to the wire diameter, bends the wire at the time of cutting to form a die. There was a problem that the wire was not inserted in the center, the wire was exposed from the molded body, and the molded body was stressed and cracked.

The object of the present invention is to prevent the wire from being exposed from the molded body when the wire is embedded in a rectangular and thin shaped powder molded body, and to cause stress and crack in the molded body. The object is to provide a wire-embedded powder molding device that does not have such a problem.

[0007]

The wire-embedded powder molding apparatus of the present invention comprises an upper punch, a die and a lower punch, each having a wire supply hole bored along the axial center, and a hole having a rectangular cross section. Embedded wire in the powder filled in, and after integrally molding the powder and the wire, in a wire-embedded powder molding apparatus for cutting the wire, a thin plate-shaped lower blade located between the upper punch and the die, and the lower blade A rolled plate having a rectangular cross section arranged above, a rectangular cross-section upper blade that is symmetrically opposed to the rolled plate about a wire and that can be engaged with the lower blade, and the lower blade and the upper blade are horizontal. And a means capable of engaging with each other at the axis of the wire.

[0008]

The present invention will be described below with reference to the drawings. FIG. 1 is a vertical cross-sectional view of a wire-embedded powder molding apparatus according to an embodiment of the present invention, and FIG. 2 is a view taken along line XX in FIG.

In the figure, reference numeral 1 is a prismatic upper punch arranged in the central portion of the wire burying powder molding apparatus of the present invention. The upper punch 1 is provided with a hole 1a for supplying a wire, which is bored in the axial center. The upper punch holder 5 fixes the columnar upper ram 6. Reference numeral 2 is a disc-shaped die arranged below the upper punch 1 and is supported and fixed to a frame of a molding device (not shown). The die 2 is provided with a square-shaped die hole 2a with its axis aligned with that of the upper punch 1, and at the lower part of this die hole 2a, the lower punch 3 having a prismatic shape with its axis aligned with that of the upper punch 1 is formed. Arranges by inserting the tip into the die hole 2a. The lower end of the lower punch 3 has a lower punch holder 7
Is supported and fixed to the cylindrical lower ram 8. Four
Is a cylindrical powder supply box disposed in close contact with the upper surface of the die 2, and slides left and right on the upper surface of the die 2 by a drive mechanism (not shown). Reference numeral 11 is composed of a wire receiver 10 incorporated in the upper ram 6 by a first wire clamping mechanism, and a wire retainer 9 that can press or release the wire C by sandwiching the wire C in the wire receiver 10. Reference numeral 15 is a second wire holding mechanism, which is an upper and lower independently movable pullback shaft 12 above the upper ram 6.
It is composed of a wire receiver 14 which is built in, and a wire retainer 9 which can be press-contacted or opened by sandwiching the wire in the wire receiver 14. Reference numeral 25 is a wire cutting and rolling mechanism, which comprises the following parts. Reference numeral 16 is a lower blade having a trapezoidal cross-section provided between the upper punch 1 and the die 2, and 19 is a rectangular cross-section capable of engaging with an acute angle portion of the lower blade 16 with the axial center of the upper punch 1 interposed therebetween. It is an upper blade having a height corresponding to the embedded length of the wire C of the body. Reference numeral 17 denotes a rolled plate having a rectangular cross-section disposed above the lower blade 16 facing the upper blade 19 and having a height corresponding to the embedded length of the wire C of the compact, and the left surface of the rolled plate 17 is compressed. It is fixed to a shaft 21a wound around a coil spring 22a. Reference numeral 20 is an upper blade 19 and 18 is a wire guide disposed on the rolling plate 17, which is a notch 18a, 2 which forms a cross-sectional shape of the wire C when the wire guides 18, 20 are joined.
0a, the cutting edge of the upper blade 19 and the rolling surface of the rolling plate 17 serve as rolling holes for the wire C, and are notches 18a, 2
It is located so as to slightly block 0a.

The drive mechanism of the above wire cutting and rolling part will be described with reference to FIG. Reference numeral 23 denotes an L-shaped left cutting arm arranged on the left side of the die hole 2a, and the lower blade 16 is fixed to the lower portion of the first tip portion 23a, and the compression coil spring 22 is provided on the right side surface.
Shafts 21a and 21b on which a and 22b are wound are slidably penetrated, and the rolling plate 17 fixed to the right ends of the shafts 21a and 21b can be moved left and right. The cam follower 26 is provided on the second tip portion 23b, and the plate cam 30 is pressed against the left side of the cam follower 26. Reference numeral 24 is a right cutting arm that is symmetrical with the left cutting arm 23 about the wire C as an axis, and has a rectangular cross-section upper blade 1 on the left side surface of the first tip portion 24a.
Fix 9 A cam follower 27 is disposed on the second tip portion 24b, and the plate cam 31 is pressed against the right side of the cam follower 27. 28a and 28b are shafts that horizontally and slidably penetrate from the side surfaces of the second tip portions 23b and 24b of the left cutting arm 23 and the right cutting arm 24, respectively.
Compression coil springs 29a and 29b are wound around a and 28b.

Next, the operating state of the device of the present invention will be described with reference to FIGS. 1, 2 and 3. First, the upper punch 1 is arranged at the upper limit. At this time, the wire C pulled out from the spool (not shown) passes through the second holding mechanism 15 and the first holding mechanism, and the wire feeding hole 1 of the upper punch 1
A length suitable for the wire embedding size of the molded body B is derived from a and protrudes. The lower punch 3 is inserted into the die hole 2a to form a gap hole having a desired filling depth, and the die hole 2 is formed in the gap hole.
Powder A is filled from the powder supply box 4 located on a (FIG. 3A). Next, after the powder supply box 4 is slid from the die 2 and retracted, the second holding mechanism is opened, the first holding mechanism is put in the holding state, and the upper ram 6 is lowered to move the wire C to the powder A. Simultaneously with the insertion, the upper punch 1 is inserted into the die hole 2a from above and the powder A is compressed from the upper surface.
At the same time, the lower punch 3 also compresses the powder A from the lower part of the die hole 2a. At this time, the pullback shaft 12 moves to the lower limit while the second holding mechanism 15 is open (FIG. 3B).

Next, the second nipping mechanism 15 nips the first nipping mechanism 11 with the first nipping mechanism 11 open, and after the upper punch 1 is raised, the plate cams 30 and 31 shown in FIG. Arms 23 and 24 slide horizontally, wire guide 18,
The wires 20 contact each other and guide the wire C, and at the same time, the wire C moves against the upper blade 19 by the compression coil spring 22.
It is rolled by the rolling plate 17 with the forces of a and 22b. The rolled length is a length corresponding to the wire embedding dimension of the molded body B. Further, when the left cutting arm 23 is moved to the right by about the diameter of the wire C, the lower blade 16 is engaged with the upper blade 19 and the wire C is cut (FIG. 3C). next,
After pulling back the pull-back shaft 12 and pulling back the wire C so as to protrude from the wire supply hole 1a of the upper punch 1 by the length suitable for the wire embedding dimension of the molded body B, that is, the rolled length, The upper surface of the punch 3 is raised until it coincides with the upper surface of the die 2, and the compact B is discharged (see FIG. 3).
(D)). This completes one process.

[0013]

As described above, according to the present invention, since the portion corresponding to the embedded length of the wire can be rolled, a die having a rectangular die shape and a width about the same as the wire diameter is formed. In this case, the embedded wire is not exposed from the outer wall of the molded product, and a quality product can be provided.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of an embodiment of the present invention.

FIG. 2 is a view on arrow XX in FIG.

FIG. 3 is a cross-sectional view showing an operating state of a main part of the present invention in process order.

FIG. 4 is a cross-sectional view showing an operating state of a main part of a conventional wire-embedded powder molding apparatus in process order.

[Explanation of symbols]

 1 Upper Punch 1a Hole 2 Die 2a Die Hole 3 Lower Punch 4 Powder Supply Box 5 Upper Punch Holder 6 Upper Ram 7 Lower Punch Holder 8 Lower Ram 9,13 Wire Presser 10,14 Wire Holder 11 First Clamping Mechanism 12 Pullback Shaft 15 2nd clamping mechanism 16 Lower blade 17 Rolling plate 18, 20 Wire guide 19 Upper blade 21a, 21b Shaft 22a, 22b Compression coil spring 23 Left cutting arm 24 Right cutting arm 23a, 24a First tip 23b, 24b Second Tip 25 Cutting / rolling parts 26,27 Cam followers 28a, 28b Shafts 29a, 29b Compression coil springs 30, 31 Plate cams A Powders B Compacts C Wires

Claims (1)

[Claims] 1. An upper punch, a die and a lower punch, each having a wire supply hole bored along an axial center, a wire embedded in a powder filled in a hole having a rectangular cross section of the die, and the powder and the wire. After integrally molding, in a wire-embedded powder molding apparatus for cutting a wire, a thin plate-shaped lower blade located between the upper punch and the die, and a rolled plate having a rectangular cross section disposed on the lower blade, and a wire. With the shaft center as the axis, the upper blade having a rectangular cross-section that is symmetrically opposed to the rolled plate and that can be engaged with the lower blade, and the lower blade and the upper blade can be moved horizontally and meshed at the wire axis. And a wire burying powder molding apparatus.