JPH0750096Y2 - A twisted lead wire cutting device in a machine for manufacturing molded products with rotary lead wires - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a twisted wire lead wire cutting device in a machine for manufacturing a molded product with a rotary lead wire, and more specifically, to a DC machine or the like. TECHNICAL FIELD The present invention relates to a twisted wire lead wire cutting device for a lead wire molded article to which a twisted wire lead wire such as a braided wire is simultaneously fixed during powder compression molding such as a carbon brush used.

(Prior Art) Generally, in order to obtain a molded product with a lead wire such as a carbon brush, a powder of a raw material such as carbon (including a granular material).
At the same time as the compression molding, one end of the lead wire prepared in advance is put into the powder and compressed to fix the lead wire to the molded product.

The lead wire prepared in advance is a long one wound on a reel or the like, and it is necessary to cut the lead wire into a predetermined length after compression molding.

Conventionally, as a method of manufacturing this molded article with lead wire,
There is a single-acting vertical type, which consists of a single die and a pair of upper and lower punches that slide up and down by hydraulic pressure or a crank, and leads from a lead wire insertion hole provided in the upper punch. One end is projected through the wire to the compression surface, and the powder filled in the die hole of the die is compression-molded by the upper and lower punches.

The lead wire is cut after this compression molding, and the cutting device is a scissor-like device in which two blades are opened and closed with an air cylinder or the like around a single point, or two blades facing each other. There are things that cut by sliding one another.

That is, since these cutting devices perform powder filling, compression, etc. in one fixed die which is a feature of the single-acting vertical type system, the cutting device is located on the die hole only during the cutting process. To do.

However, in recent years, there has been a great demand for molded products with lead wires,
Further, since it has to be provided at a low cost, a new manufacturing machine for molded articles with lead wires has been desired.

And, as this new manufacturing machine, paying attention to the fact that ordinary molded products without lead wires such as tablets of medicines are mass-produced at low cost by a rotary powder compression molding machine, powder filling, A machine for manufacturing a molded product with a rotary lead wire has been developed in which each process such as compression and cutting is performed during one rotation of the die.

This conventional technique is disclosed in Japanese Utility Model Laid-Open No. 62-50842 (Japanese Utility Model Application No. 62-1).
No. 43420).

That is, this technique consists of a fixed blade arranged on the circumference through which the die passes by the rotation of the turntable, and a rotary blade that is in sliding contact with the fixed blade and rotates at a speed faster than the peripheral speed of the die of the turntable. ,
It is a lead wire cutting device in a manufacturing machine of a rotary type lead wire-formed molded article, characterized in that a lead wire fixed to a molded article is cut into a desired length during rotation of a turntable.

(Problems to be solved by the invention) In such a conventional technique, the rotating lead fixed to the molded product in the die hole is stopped without stopping the die rotating at a relatively high speed. Although the wire can be reliably cut, there is a problem in that it cannot be cut cleanly depending on the type of lead wire and the durability is poor.

That is, the twisted wire is usually used as the lead wire, and especially when the twisted wire is thick (the wire diameter is 3 m / m or more), if the cut end is not clean, the There is a problem that the tip, which is the cut end, is not completely fixed.
Moreover, the twisted wire has a right twist and a left twist, and if the twist direction and the rotation direction of the rotary blade are improper, the twist will be returned at the time of cutting and the cut parts of the twist line will be separated. There is also the problem of being disturbed.

Further, since the rotary type manufacturing machine is intended for mass production, the cutting frequency is high, but the cutting point is constant and the durability of the cutting blade is poor.

(Means for Solving Problems) In order to solve such problems, according to the present invention, a plurality of mortars (2) arranged in a continuously rotating turntable (1) are provided with holes in mortars (2). The lower punch (4) for filling the powder (3) and determining the filling amount of the powder (3) and the tip of the twisted wire lead wire (5) supplied from the lead wire feeder were made to protrude from the compression surface. Upper punch (9) and upper roll and lower roll (14)
A rotary type lead wire molded article manufacturing machine for compressing the powder (3) in the die hole together with one end of the twisted lead wire (5) by passing through the gap to obtain a lead wire molded article (8). In the twisting wire lead wire (5) by rotating the turntable (1)
A circular outer rotary blade (6) having a continuous cutting edge (6a) on the entire circumference and a circular cutting edge (7a) continuous on the entire circumference so as to face each other across a circumferential line (17) through which The inner rotary blade (7) and the outer rotary blade (6) and the inner rotary blade (7) are independent motors (12A) (12).
The twisted wire lead wire (5) fixed to the molded product is kept rotating by the B) so that the twisted wire lead wire does not untwist. A twisted wire lead in a machine for manufacturing a molded product with a rotary lead wire, characterized in that the twisted wire is cut by passing between the rotary blade (6) and the inner rotary blade (7) without being twisted back to a desired length. A wire cutting device is provided.

In the above structure, the rotary blades (6) and (7) are rotatable, and the twisted wire lead wire (5) passes through the rotary blades (6) and (7) to the twisted wire lead wire (5). Can be driven.

In this case, the structure can be simplified and the cost can be reduced.

In the above configuration, the outer rotary blade (6) and the inner rotary blade (7) can be driven to have different peripheral speeds and forcedly rotated.

In this case, it can be cut more neatly.

Still further, in the above configuration, the rotary blades (6) (7) are
It can be rotated at a peripheral speed of 600 m per minute.

In this case, even in a twisted wire lead wire having a wire diameter of 3 m / m or more, it is possible to eliminate the disorder of the twisted wire at the cut portion.

(Operation) The above technical means operates as follows.

Molded product with lead wire (8) is a turntable (1) that rotates continuously.
The powder (3) as a raw material is quantitatively filled in the mortar holes of a large number of dies (2) arranged in the upper punch (9) and the lower punch (9) between the upper roll and the lower roll (14) which are compression rolls. The powder (3) is compressed and formed by passing the punch (4) and one end of the twisted wire lead wire (5) is fixed to the molded product, and then the twisted wire lead wire (5) It is obtained by cutting the lead wire, the lead wire molded product (8) is pushed up onto the rotary disc (1) by the raising of the lower punch (4), and is taken out of the rotary disc (1) by the damper (15). Yes,
The outer rotary blade (6) and the inner rotary blade (7) face each other between the compression process and the removal process, and on the circumferential line (17) through which the twisted wire lead wire (5) passes. It is arranged to do.

The rotary blades (6) and (7) are at least rotatable, and the lead wire (5) has an outer rotary blade (6) and an inner rotary blade (7).
It will pass between and. However, since the outer rotary blade and the inner rotary blade are separately driven to rotate by independent motors, the rotation direction of each rotary blade can be changed by simply changing the rotation direction of each motor. It can be easily set in the direction in which the twisting back of the wire does not occur. Therefore, it is possible to appropriately cut lead wires twisted in any direction, and it is possible to cut various twisted wire lead wires neatly without loosening them. .

Further, the rotating blades (6) and (7) change their cutting positions each time they are cut due to the rotation and the like, and the cutting is sequentially performed on the entire circumference of the blade, so that the wear of the blade is made substantially uniform over the entire circumference. Therefore, the life of the blade can be remarkably improved as compared with the case where the lead wire is always cut at the fixed blade edge portion.

Furthermore, the lead wire (5) has a circular rotary blade (6).
Since it passes between (7), it is guided by the outer circumference of the rotary blades (6) and (7), and the configuration such as positioning is unnecessary.

(Embodiment) An embodiment of the present invention will be described with reference to the drawings (1)
Is a turntable in which a large number of dies (2) are arranged on the circumference.

(4) is a lower punch which is slidably inserted into the die (2), and the lower punch (4) forms the bottom of the die (2) and is inserted into the upper punch holder (20). The upper punch (9) with which it is fitted compresses the powder (3) up and down.

(5) is a twisted wire lead wire, and the lead wire (5)
The reel is wound in advance on a reel (not shown) arranged above the turntable (1), and is passed through a lead wire insertion hole (16) penetrating the upper punch holder (20) and the upper punch (9). It is supplied from the compression surface of the upper punch (9), and its tip end is fixed together with the powder (3) to the molded product.

(6) is an outer rotary blade attached to a pedestal not shown,
The outer rotary blade (6) has its cutting edge located on the circumferential line (17) around which the twisted wire lead wire (5) rotates by the rotation of the rotary disc (1) and above the die (2). is doing.

(7) is an inner rotary blade attached to the arm (10) via a bearing on a rotatable shaft, and the rotary blade (7) has an outer rotary blade (around the circumferential line (17) as a boundary. It is arranged so as to face 6). As shown in FIG. 1, the outer rotary blade (6) and the inner rotary blade (7) are formed by continuously forming cutting edges (6a) and (7a) on their entire circumferences, respectively. Is made.

The rotary blades (6) and (7) are forcibly rotated by individually transmitting the driving forces of the motors (12A) and (12B) independent of each other by the belt (11). That is, the outer rotary blade (6) is rotationally driven by one motor (12A) and the inner rotary blade (7) is driven by the other motor (12A).
It is designed to be rotated by B).

(8) is a molded product with a lead wire taken out by the damper (15) to the chute (18), (14) is a compression roll, (13)
Is a feedstock for quantitatively filling the powder (3), (19) is a hopper for supplying the powder (3) to the feedstock (13), and (21) is the upper punch holder (20) with the upper punch (9). The upper punch cap to wear.

The heights of the rotary blades (6) and (7) are adjustable, and are appropriately adjusted according to the length of the twisted lead wire 5 fixed to the molded product. The rotation direction of each rotary blade (6) (7), in other words, the operating direction of each motor (12A) (12B) is the optimum direction corresponding to the twisting direction of the twisted wire lead wire 5. You can set it to. That is, the rotary blades (6) and (7) are driven to rotate in a direction that does not cause the twisting back of the twisted linear lead wire.

(Effect of the Invention) Since the present invention is configured as described above, the twisted wire-shaped lead wire fixed to the molded product that rotates together with the die is sequentially stopped between the outer rotary blade and the inner rotary blade without being temporarily stopped. It is possible to cut it into a predetermined length by passing through, and it is possible to efficiently manufacture a molded product with a lead wire in a large amount. Moreover, the operation required for the cutting is due to the two rotating blades that rotate, and because the cutting position is continuously changed by only the rotational movement, the durability of the blade also becomes good, The cut point of the twisted linear lead wire is also beautiful. In particular, according to the present invention, the inner rotary blade and the outer rotary blade are separately driven by mutually independent motors, so that the rotational directions of both rotary plates can be cut according to the characteristics of the twisted wire. The rotating blades are rotated in a direction in which the twist does not unravel, and the cutting is performed regardless of the direction in which the lead wire is twisted. Therefore, various lead wires can be reliably and cleanly cut by the rotary blades without causing twisting back.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows an embodiment of a twisted wire lead wire cutting device in a rotary lead wire molded product manufacturing machine according to the present invention. FIG. 1 is a main part of the entire manufacturing machine. A plan view and FIG. 2 are longitudinal cross-sectional views of a main part. In the drawings, (1) is a rotary disk, (2) is a die, (3) is powder, (4) is a lower punch, (5) is a twisted wire lead wire, (6)
Is an outer rotary blade, (7) is an inner rotary blade, (8) is a molded product with a lead wire, (9) is an upper punch, (10) is an arm, (11) is a belt, (12A) and (12B) are motors. , (13) is Fedsch,
(14) is a lower roll, (15) is a damper, (16) is a lead wire insertion hole, (17) is a circumferential line, (18) is a chute, (19)
Is a hopper, (20) is an upper punch holder, and (21) is an upper punch cap.

Claims (1)

[Scope of utility model registration request] 1. A lower punch (4) for filling powder (3) into a die hole of a die (2) arranged in a large number on a continuously rotating turntable (1) and determining a filling amount of the powder (3). And the upper punch (9) in which the tip of the twisted wire lead wire (5) supplied by the lead wire supply device is projected from its compression surface, and passes between the upper roll and the lower roll (14). In a rotary lead wire molded article manufacturing machine, the powder (3) in a die hole is compressed together with one end of a twisted wire lead wire (5) to obtain a lead wire molded article (8). By the rotation of the twisted wire lead wire (5), a circular outer rotary blade (6) having a continuous cutting edge on all sides is formed so as to face the circumference line (17) through which the twisted linear lead wire (5) passes. A circular inner rotary blade (7) having a cutting edge is provided, and the outer rotary blade (6) and the inner rotary blade (7) are independently provided. Motor (12A) (12
The twisted wire lead wire (5) fixed to the molded product is kept rotating by the B) so that the twisted wire lead wire does not untwist. A twisted wire lead in a machine for manufacturing a molded product with a rotary lead wire, characterized in that the twisted wire is cut by passing between the rotary blade (6) and the inner rotary blade (7) without being twisted back to a desired length. Wire cutting device.