JPS6117606B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a punching and trimming method and apparatus for forming a center hole and trimming the outer periphery of an EP record in a record forming apparatus.

The 17cm EP record was originally produced for use with autochangers and music boxes, and for this reason the center hole has a large diameter for automatic performance. Therefore, after pressing a record, it was necessary to perform outer trimming to remove the burrs on the outer edge and to drill a center hole in the center, but in the past, these processes were performed in separate processes using different sections. . This leads to an increase in the size of the device and requires a long time, and the impact on cost cannot be ignored.

The present invention has been made in view of the above-mentioned points, and the punch rod used when forming the center hole is used as a center guide for trimming the outer periphery, so that the center hole formation and the outer periphery trimming are performed in the same section. Also, by using the friction between the center punch rod and the drilled record hole, the punch rod is raised and the record is transported to the upper part without any special equipment, and then transported to the suction cup on the thread to be sent to the next process. This is an attempt to solve the above-mentioned problems.

The present invention will be explained below. FIG. 1 shows an embodiment of a punch-trimming device. First, the punch device consists of a punch rod 4 that moves up and down in a cylinder 2 attached to a frame 1 by a hydraulic actuator 3, and a die 6 that moves up and down by a hydraulic actuator. The punch rod 4 has a concave surface 4a having a predetermined radius of curvature formed on its lower surface, thereby improving punching performance. Further, a circumferential groove 4b is formed on the side circumference of the lower part of this punch rod 4, and this circumferential groove 4b is formed in the lower corner 4 as shown in the enlarged view of FIG.
b ₁ is tilted. On the other hand, the die 6 is aligned with the axis of vertical movement of the punch rod 4, and
A cylinder part 6a having an inner diameter slightly larger than the outer diameter of the cylinder part 6a is formed, and this cylinder part 6a has an opening 6 on one side of the lower part.
It communicates with b.

The pressed record is set by a device called a gripper, which is mounted on a horizontally moving sled and grips the burrs on the pressed record. 9 is a hole 9 for inserting the punch rod 4
It is supported by the thread 7 with a pull-out support plate having a.

The trimming device is composed of two rotary blades 10 and 11 arranged so that the side edge blades face each other, and are set close to each other.

In the above, when the center of the burred record carried by the gripper coincides with the axes of the punch rod 4 and the die 6, the punch rod 4 descends and the die 6 rises, causing the punch rod 4 to move upward. punches out the center of the record 12 and enters the hole 6a of the die 6. During this punching, hydraulic actuators 3 and 5
The balance is suppressed by this. As a result, a large diameter central hole 12a is formed in the record disc 12, and the punched remaining board falls downward through the hole 6a and the opening 6b.

Then, the record 12 is inserted into the circumferential groove 4 of the punch rod 4.
When the punch rod 4 is punched to a position where it fits into the record 12, the punch rod 4 is raised and the die 6 is lowered to open the center hole 12a formed in the record 12, as shown in FIG.
is supported by fitting into the circumferential groove 4b. In this state, the center hole 12 of the record 12
Since the inner diameter of a is larger than the outer diameter of the circumferential groove 4b,
The record disc 12 can freely rotate using the punch rod 4 as a center guide.

Next, while rotating the record 12 by an appropriate means, the outer edge is cut off by the rotary blades 10 and 11 to perform outer periphery trimming.

After this, if the rotary blades 10 and 11 are moved away and the punch rod 4 is raised, the record 12 will hit the pull-out support plate 9, and if the punch rod 4 is further raised, the record 12 will be moved to the corner of the circumferential groove 4a. It comes off along the slope of 4b ₁ and comes off from the punch rod 4.
It should be noted that the record 12 is sucked by vacuum suction cups 8 from the front and back of contact with the pull-out support plate 9, so that it will not fall.

As described above, the punch rod that punched out the center hole now works as a center guide to perform outer circumference trimming. Therefore, there is no need for a special center guide for outer circumference trimming, and there is no need to move the record for outer circumference trimming, and both processes can be performed in the same section, making it easier to downsize the equipment. be able to.

[Brief explanation of the drawing]

FIG. 1 is a schematic mechanical diagram of the punching and trimming device of the present invention, and FIG. 2 is a partially enlarged view of the punch pin. DESCRIPTION OF SYMBOLS 1... Frame, 2... Cylinder, 3... Hydraulic actuator, 4... Punch rod, 5... Hydraulic actuator, 6... Die, 7... Thread, 8
...Bakyum suction cup, 9...Pull-out support plate, 10,1
1... Rotating blade, 12... Record disc.

Claims (1)

[Scope of Claims] 1. A punch-trimming method in which a center hole is formed in a pressed and transported record using a punch rod, and then the outer periphery of the record is trimmed using the punch rod as a center guide. 2 Trimming means consisting of a set of a punch rod and die that forms a center hole in a pressed and transported record, and a set of rotary blades that rotates using the punch rod as a center guide and removes the outer edge of the record. and a suction suction cup that raises and transports the record without the need for any special equipment by the friction between the punch rod and the center hole of the record punched by the punch rod, and transports the record to the next process. A punch-trimming device consisting of a device that transports records up to a point.