JP3148004U - Wire fixed dimension feed mechanism - Google Patents

Abstract

Provided is a wire fixed-size feed mechanism capable of slowing a wire feed speed and less wire clogging. A mold member 19 provided with a through-hole through which a wire 1 protrudes is attached, and a first movable member 10 that moves so as to block the mold opening and move away from the opening, and a first movable member. An air cylinder 9 mounted on the member 10, a second movable member 11 driven by the air cylinder 9 and separated and returned from the first movable member 10, and a second movable member 11 attached to the second movable member 11. When the movable member 11 is separated from the first movable member 10, the wire 1 is not separated, and when the second movable member 11 is returned to the first movable member 10, the first clamp 16 that grasps the wire 1, and the first When the first movable member 10 is attached to the movable member 10 and the first movable member 10 faces the mold or is separated from the mold, the wire 1 is grasped, and when the second movable member 11 is returned to the first movable member 10, the wire 1 is grasped. First of all The second clamp 17 away is provided. [Selection] Figure 1

Description

  The present invention relates to a capacitor molding apparatus, and more specifically, a wire serving as a lead wire is supplied and cut into a mold into which capacitor powder is charged, and the wire necessary for molding the next capacitor chip is sent out again. The present invention relates to a wire fixed dimension feeding mechanism.

  Patent Document 1 discloses a tantalum capacitor forming apparatus. The wire is fed out from a wire feeder that moves up and down. With reference to FIG. 5 to FIG. 7, a wire constant-dimension feeding mechanism of a conventional capacitor forming apparatus will be described.

  FIG. 5 is an operation diagram showing each stage until a capacitor chip is molded in a conventional capacitor molding machine. (A) is a stage where the powder supply box 4 moves to the upper part of the mold 18 and the capacitor powder 5 is supplied. (B) is a stage in which the powder supply box 4 is separated from the upper part of the mold 18. (C) is a stage in which the wire feeder 2 is lowered and the wire 1 is inserted into the capacitor powder 5 in the mold 18. (D) is a stage in which the left punch 6 and the right punch 7 in the mold 18 are operated to press the capacitor powder 5 and the wire 1 is cut by the cutter 3. The mold member 19 of the wire feeder 2 closes the upper opening of the mold 18. (E) is a stage in which the wire feeder 2 moves up and leaves the mold 18. (F) is a stage in which the left punch 6 and the right punch 7 move to the left and the capacitor chip 8 is discharged.

  FIG. 6 is a time chart of the wire feeder of FIG. The vertical axis in FIG. 6 indicates the upper position and the lower position, and the horizontal axis is the time axis. The wire feeder 2 moves up and down between an upper position and a lower position by a cam (not shown) attached to the shaft of the motor every cycle in which the capacitor chip is formed. As an example, one cycle is about 1 second, and a capacitor chip is manufactured at a molding speed of 1 piece / second. When one cycle is divided into S1 to S5 according to the movement of the wire feeder 2, S1 corresponds to (A) and (B) of FIG. 5 at a stage where the capacitor powder is supplied to the mold. S2 is a stage where the wire feeder 2 descends, and corresponds to (C) of FIG. S3 is a stage where the capacitor powder 5 is pressed and the wire is cut, and corresponds to (D) of FIG. S4 corresponds to FIG. 5E when the wire feeder 2 is raised. S5 is the stage where the molded capacitor chip is discharged, and corresponds to FIG. As shown in FIGS. 5F and 5E, after the wire 1 is cut by the cutter 3, the wire 1 is fed out of the cutter 3 by a predetermined dimension and protrudes in a short time when the wire feeder 2 is raised. .

  FIG. 7 is a configuration diagram and operation diagram of a conventional wire feeder. As shown to (A), the structure of the wire feeder 2 is the 1st movable member 10 which is driven by a motor, and moves up and down, the 2nd movable member 11 connected with the 1st movable member 10 with the tension spring 13, The 1st movable The cutter 3 provided in the lower part of the member 10 and the wire supply hole 14 which correct | amends a wire bending are provided. The wire 1 protrudes downward from the wire supply hole 14 provided in the mold member 19 through the first clamp 16 provided in the second movable member 11 and the second clamp provided in the first movable member 10. The second movable member 11 is provided with a stopper hole 15 through which the stopper 12 extending from the frame of the capacitor forming apparatus passes.

  In FIG. 7, (A) is when the wire feeder 2 descends from the upper position, and corresponds to the start of S2 in FIG. That is, the first movable member 10 is driven by the motor and descends. At this time, the first clamp 16 separates the wire 1 without grasping it, and the second clamp 17 grasps the wire 1. The next (B) is when the wire feeder 2 is lowered to the lower position, and corresponds to the end of S2 in FIG. As the first movable member 10 is lowered, the second movable member 11 is dragged and lowered by the tension spring 13, but stops because the stopper 12 contacts the upper end of the stopper hole 15. When the wire feeder 2 is lowered to the lower position, the tip of the wire 1 is inserted into the capacitor powder 5 in the mold. If the first movable member 10 is lowered by L and the second movable member 11 is lowered by M, the distance between the first clamp 16 and the second clamp 17 is LM (= N). N is the delivery amount of the wire 1.

  In FIG. 7, (C) is when the wire feeder 2 is lifted from the lower position, which is immediately after S4 of FIG. That is, the 1st movable member 10 is driven by a motor and raises. At this time, the first clamp 16 grasps the wire 1 and the second clamp 17 separates the wire 1 without grasping it. The tip of the wire 1 is located immediately below the cutter 3 and has not yet passed through the wire supply hole 14. (D) is when the wire feeder 2 returns to the upper position, and corresponds to the start of S5 in FIG. When the first movable member 10 is raised, the tip of the wire 1 is greatly protruded. However, since the second movable member 11 pulls up the wire 1 by the length of M, the wire 1 is eventually sent out at a predetermined length N. The tip of the wire 1 protrudes downward from the wire supply hole 14 by a predetermined length.

Usually, the wire 1 has a diameter of about 0.2 mm, but recently, a wire having a smaller diameter of 0.15 mm is also used. The diameter of the wire supply hole 14 is 0.12 mm if the diameter of the wire 1 is 0.1 mm. Therefore, in the step of S4 in FIG. 6 in which the thin wire passes through the wire supply hole 14 at high speed, the wire may come into contact with the wire supply hole 14 and become clogged. Further, the impact of stopping when the second movable member 11 returns to the original upper position may shift the position where the wire 1 of the first clamp 16 is gripped, resulting in a large variation in the length of the cut wire. Such a phenomenon becomes prominent when the capacitor chip forming cycle is further accelerated. In the tantalum capacitor, the length and width of the capacitor chip are about 1 mm × 1 mm × 1 mm, and the length of the cut wire is about 6 to 8 mm.
JP-A-8-124810

  The present invention has been made in order to solve the conventional problems, and an object of the present invention is to provide a wire constant-dimension feeding mechanism that can reduce the wire feeding speed and reduce wire clogging.

  In order to achieve the above object, the wire fixed dimension feeding mechanism according to the present invention is a capacitor molding machine that inserts a wire into a capacitor powder put into a mold and presses to form a capacitor chip. A mold member having a through-hole through which the wire protrudes closes an opening of the mold into which the capacitor powder is charged and moves away from the opening; and the first movable member An air cylinder mounted on the member, driven by a piston of the air cylinder, separated from the first movable member by a predetermined length, and returned to the second movable member; attached to the second movable member; When the second movable member is separated from the first movable member, the wire is released without grasping, and when the second movable member is returned to the first movable member, the wire is removed. A first clamp that is bitten and attached to the first movable member. When the first movable member faces the mold and leaves the mold, the wire is grasped, and the second movable member is the first movable member. And a second clamp for releasing the wire without holding it when the member is returned to the member.

  The air cylinder according to claim 2 is driven in a time period other than during the operation of moving the first movable member toward the mold or moving away from the mold during a cycle in which the capacitor chip is molded. Characterized by

  According to the wire fixed dimension feeding mechanism of the first aspect of the present invention, since the air cylinder is adopted in the wire fixed dimension feeding mechanism, there is no impact and the wire speed is slower than the fixed dimension feeding by the spring and the stopper. As a result, wire clogging can be prevented. Also, since the impact when the piston in the air cylinder stops is small, there is little variation in wire length.

  According to the second aspect, the air cylinder is driven in a time zone other than during the operation in which the first movable member is moving toward the mold or separated from the mold. It is not necessary to feed out the wire in a short time when the member moves from the upper position to the lower position or from the lower position to the upper position, and the air cylinder is not operated in a short time, so a stable wire constant dimension feeding operation is performed. Can be made.

  The wire fixed-dimension feeding mechanism according to the present invention will be described below with reference to the drawings. In the embodiment, the wire fixed dimension feeding mechanism will be described as the wire feeder 2. Moreover, the same code | symbol was used for the same site | part as a prior art example.

  FIG. 1 is a configuration diagram of a wire feeder according to the present invention and an operation diagram of the wire feeder alone. As shown to (A), the structure of the wire feeder 2 is driven to the 1st movable member 10 which is driven by a motor (not shown), moves up and down, the air cylinder 9 attached to the 1st movable member 10, and the air cylinder 9 And a mold member 19 provided with a wire supply hole 14 for correcting the wire bending. The wire 1 is sandwiched between a first clamp 16 provided on the second movable member 11 and a second clamp provided on the first movable member 10. A cutter 3 is provided below the first movable member 10.

  As shown in FIGS. 1A to 1D, the fixed-size feeding operation of the wire feeder 2 alone is as follows. (A) shows the case where the second clamp 17 is holding the wire 1 while the wire 1 is cut by the cutter 3. When the piston 9a of the air cylinder 9 is raised from here, the second movable member 11 is raised. At this time, since the first clamp 16 does not hold the wire 1, the wire 1 does not move, and only the second movable member 11 rises. As a result, as shown in (B), the second movable member 11 rises upward by a length N. (C) shows a case where the piston 9 a of the air cylinder 9 is lowered while the first clamp 16 holds the wire 1 and the second clamp 17 separates the wire 1. The wire 1 is sent downward as the second movable member 11 is lowered. At this time, the wire 1 passes through the wire supply hole 14 of the mold member 19. As a result, as shown in (D), the wire 1 is fed out by a predetermined length N.

  As shown in FIG. 1, T1 is an operation in which the air cylinder 9 pulls the second movable member 11 away from the first movable member 10 with the first clamp 16 grasping the wire 1 and the second clamp 17 separating the wire. Then, T2 is the operation of changing the wire 1 between the first clamp 16 and the second clamp 17, and the first clamp 16 releases the wire 1 and the second clamp 17 holds the wire. T3 is an operation in which the air cylinder 9 draws the second movable member 11 of the first movable member 10 in a state where the first clamp 16 releases the wire 1 and the second clamp 17 grasps the wire. Sent out.

  FIG. 2 is an operation diagram when the wire feeder of FIG. 1 is applied to a capacitor molding machine. FIG. 3 is a time chart when the wire feeder of FIG. 1 is applied to a capacitor molding machine. As shown in FIGS. 2 and 3, (A) in FIG. 2 is when the first movable member 10 is driven by the motor and the wire feeder 2 is lowered from the upper position, and corresponds to the start of S <b> 2 in FIG. 3. At this time, the first clamp 16 separates the wire 1 and the second clamp 17 holds the wire 1. Next, (B) of FIG. 2 is when the wire feeder 2 is lowered to the lower position and corresponds to the end of S2 of FIG. When the wire feeder 2 is lowered to the lower position, the tip of the wire 1 is inserted into the capacitor powder 5 in the mold. The first movable member 10 is lowered by L.

  2, (C) corresponds to the end of S4 in FIG. 3 in a state where the wire feeder 2 has returned from the lower position to the upper position. At this time, the first clamp 16 releases the wire 1 and the second clamp 17 holds the wire 1. The tip of the wire 1 is cut and positioned immediately below the cutter 3. The tip of the wire 1 is not passing through the wire supply hole 14 of the mold member 19. (D) shows a case where the second movable member 11 is raised upward by a length N by the air cylinder 9. (E) shows a case where the air cylinder 9 moves down with the first clamp 16 holding the wire 1 and the second clamp 17 separating the wire 1. As a result, as shown in (A), since the wire 1 is sent out by the length N, the tip of the wire 1 passes through the wire supply hole 14 of the mold member 19 and protrudes downward.

  As shown in FIG. 3, the operations of T1 to T3 are performed from the stage (S5) when the capacitor chip is discharged to the stage (S1) where the capacitor powder is supplied into the mold of the next cycle. Since the time widths of S5 and S1 are longer than the time widths of S2 and S4, the wire 1 can be sent out slowly.

  FIG. 4 is a diagram showing the variation accuracy of the wire length. In a wire feeder employing an air cylinder, the cut wire is within a range of plus 0.002 mm to minus 0.002 mm with respect to a predetermined length (about 6 mm), and the accuracy is improved. A conventional wire feeder using a spring has a large variation within a range of plus 0.012 mm to minus 0.06 mm with respect to a predetermined length.

  The present invention is suitable for a wire feeder of a capacitor forming apparatus.

It is the block diagram of the wire feeder by this invention, and the operation | movement figure by a wire feeder single-piece | unit. (A) is a state in which the wire is cut by a cutter, (B) is a state in which the second movable member is raised upward by a length N, and (C) is a state in which the first clamp and the second clamp are holding the wire. , (D) shows a state in which the wire is fed out by a fixed size. FIG. 2 is an operation diagram when the wire feeder of FIG. 1 is applied to a capacitor molding machine. (A) is when the wire feeder is lowered from the upper position, (B) is when the wire feeder is lowered to the lower position, (C) is when the wire feeder is returned to the upper position, and (D) is the second movable member. (E) shows the start of the wire feeding operation. It is a time chart when the wire feeder of FIG. 1 is applied to a capacitor molding machine. It is a figure which shows the dispersion | variation precision of the wire length when the wire feeder of FIG. 1 is applied to a capacitor molding machine. It is an operation | movement figure which shows each step until the capacitor | condenser chip | tip is shape | molded in the conventional capacitor | condenser molding machine. (A) is the stage where the capacitor powder is supplied from the powder supply box, (B) is the stage where the powder supply box is separated from the mold, (C) is the stage where the wire feeder is lowered, and (D) is the capacitor powder being pressed. The stage where the wire is cut with a cutter, (E) is the stage where the wire feeder is raised, and (F) is the stage where the capacitor chip is discharged. It is a time chart of the conventional wire feeder. It is a block diagram and operation | movement figure of the conventional wire feeder. (A) is when the wire feeder is lowered from the upper position, (B) is when the wire feeder is lowered to the lower position, (C) is when the wire feeder is raised from the lower position, and (D) is when the wire feeder is upper Indicates when it returned to position.

Explanation of symbols

1 Wire 2 Wire feeder (fixed wire feed mechanism)
3 Cutter 4 Powder Supply Box 5 Capacitor Powder 6 Left Punch 7 Right Punch 8 Capacitor Chip 9 Air Cylinder 9a Piston 10 First Movable Member 11 Second Movable Member 12 Stopper 13 Tension Spring 14 Wire Supply Hole 15 Stopper Hole 16 First Clamp 17 Second clamp 18 Mold 19 Mold member

Claims (2)

In the capacitor molding machine that inserts the wire into the capacitor powder put into the mold and presses to mold the capacitor chip,
A first movable member that has a through-hole through which the wire provided at the tip projects and closes the opening of the mold into which the capacitor powder is charged and moves away from the opening;
An air cylinder mounted on the first movable member;
A second movable member driven by a piston of the air cylinder, separated from the first movable member by a predetermined length, and returned;
When the second movable member is attached to the second movable member and the second movable member is separated from the first movable member, the wire is released without grasping, and when the second movable member is returned to the first movable member, the wire is separated. A first clamp for grabbing,
When the first movable member is attached to the first movable member, when the first movable member faces the mold and when the first movable member leaves the mold, the wire is grasped, and the second movable member is returned to the first movable member. A wire fixed-dimension feeding mechanism, comprising: a second clamp for releasing the wire without holding it. The air cylinder is driven in a time period other than during the operation of moving the first movable member toward the mold or moving away from the mold during a cycle in which a capacitor chip is molded. The wire fixed-dimension feeding mechanism according to claim 1.

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