JPH02226567A - Disk cartridge manufacturing device - Google Patents

Abstract

PURPOSE:To improve the accuracy of multipoint welding and to heighten the assembling accuracy of a cartridge by controlling horn pressure and converter conduction time at every welding part by the integrated material of a converter and a tool horn provided individually. CONSTITUTION:The multipoint welding is applied on upper and lower disk cartridge cases 13 by the welding horn 11 of the integrated material of the converter 8 and the tool horn provided individually, and they are joined and assembled. The conduction time of the converter 8 and the pressing force of the horn 10 are adjusted at every horn, thereby, the accuracy of the multipoint welding can be improved, and the assembling accuracy of the disk cartridge can be heightened.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an apparatus for manufacturing a disk cartridge in which upper and lower cartridge cases are stacked one on top of the other and a welding horn is pressed against a plurality of welded parts to weld the two cases together.

[Conventional technology]

FIG. 2 is a side view of a conventional disc cartridge manufacturing apparatus.

In the figure, 1 is a machine base, 2 is a column, 3 is an air cylinder, and 4 is an actuator at the tip of a base 5 that is vertically slidably engaged with a rail 6 via a bearing 7, and is moved by the air cylinder 3. . In Ys 5,
A converter 8 made of an electrostrictive element that converts electrical signals into mechanical vibrations and a welding horn 11 driven by the converter 8 are attached. The welding hoe 711 is used to attach the cartridge case 1 carried on the belt conveyor 12.
3, it is composed of a tool horn 10 that descends into contact with the tool horn 10, and a fixed horn 9 for adjusting the amplitude given to the tool horn IO. Note that 14 is a stopper for positioning the lower limit when lowering the base 5 (and therefore lowering the tool horn 10).

3 and 4 are plan views of the upper and lower cartridge cases.

FIG. 3 shows the upper case 20, and FIG. 4 shows the lower case 24. In both figures, 21 is a magnetic head insertion opening, and 22 is a regulating rib that regulates the storage position of a magnetic disk (not shown). Welded portions 23, which are welded by the tool horn 10 described above, are provided at the four corners indicated by reference numerals 23.

Therefore, the manufacturing equipment is provided with four tool horns to press the four welded parts 23, but conventionally,
These four tool horns 10 were provided in an integrated manner. Therefore, the vibration energy consisting of amplitude, frequency, pressing force, welding time, etc. is the same for all four tool horns, and each welding part 23 is ultrasonically welded with this same energy.

By the way, the cartridge case 13 (upper case 20,
The shape of the welded part 23 of the lower case 24) and its surroundings,
The wall thickness etc. are not necessarily the same at all four locations, and since the cartridge case 13 is conveyed by a conveyor, the horizontality of the cartridge case 13 is not precise, and the heightwise position of the welded portion 23 tends to be uneven.

[Problem to be solved by the invention]

Therefore, vibration energy is not uniformly applied to all the welded parts 23, resulting in insufficient welding. Furthermore, if vibration is applied over an extra period of time to eliminate the insufficiently welded portions, over-welded portions will occur at other locations. As described above, welding strength varied, welding defects occurred, and the operating rate decreased due to adjustment. However, the problem is that energy consumption increases, and the amount of dust generated increases due to ultrasonic vibration, which causes the dust to adhere to the disk and prevent recording and recording.
There was also the problem that the reproduction characteristics deteriorated.

It is an object of the present invention to eliminate the drawbacks of poor welding and reduced operating rates that the conventional products had, and thereby provide a disk cartridge manufacturing apparatus with excellent welding accuracy.

[Means to solve the problem]

In order to achieve this object, the present invention presses a welding horn driven by a converter to a plurality of welded parts of the upper and lower cartridge cases stacked one on top of the other, and applies vibrational energy from this welding horn to the welded parts of the upper and lower cartridge cases. In a disk cartridge manufacturing device that performs the welding process 9, an integrated converter and a welding horn are separately provided corresponding to the welded parts of the cartridge case, and the time for energizing the converter and the pressing force of the welding horn against the cartridge case are controlled. It is characterized by being configured to be individually adjustable.

[Effect]

In the present invention, the energization time (timing) to the converter,
Since the pressing force of the welding horn composed of the fixed horn and the tool horn can be adjusted individually, the optimum conditions can be set for each welding part.

For example, the welding time is about 0.05 seconds for relatively thick or complicated shapes, and about 0.02 seconds for relatively thin or simple shapes.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings. still,
The same parts as in the conventional example shown in FIG. 2 are given the same reference numerals, and their explanation will be omitted.

FIG. 1 is a partially longitudinal side view showing a disk cartridge manufacturing apparatus according to an embodiment of the present invention.

For example, four welding horns 11 attached to the tip of a center rod 30 integrally provided with the base 5 are each provided with an individual converter (consisting of two electrostrictive elements) 8, Further, in order to adjust the pressing force of this welding horn 11, a coil spring 31 and an adjustment screw 32 are provided, respectively. Further, the biasing force of the coil spring 31 is applied to a sleeve 33 that houses the converter 8 and the fixed horn 9.

By having such a configuration, each welding horn 11
Drive and pressure adjustment can be performed independently for each.

Cartridge case 13 is conveyed by conveyor 12 directly below tool horn 10. At this time, the jig 34 receiving the pressing force of the tool horn 10 rises and holds the cartridge case 13 by suction to prevent the cartridge case 13 from escaping in the vertical and horizontal directions due to the vibration. In this state, the welded parts 23 are pressed together by the tool horn 10, and each welded part 23 is
Apply welding energy under optimal conditions. Note that each welding horn 11 is fixed to the base 5 so as to be able to move independently in the vertical direction. Each converter 8 also has an oscillator (
(not shown) are connected.

Note that the present invention is applicable not only to the above-mentioned ultrasonic welding system but also to a thermal welding system.

〔Effect of the invention〕

As explained above, in the present invention, since welding can be performed under optimal conditions for each welding part, it is possible to improve the welding accuracy of the multi-point welding system and improve the assembly accuracy of the disk cartridge. It is effective in saving energy and shortening processing time by optimizing energy supply.

[Brief explanation of the drawing]

FIG. 1 is a partially longitudinal side view showing a disc cartridge manufacturing apparatus according to an embodiment of the present invention, FIG. 2 is a side view of a conventional disc cartridge manufacturing apparatus, and FIG.
FIG. 4 is a plan view of the upper and lower cartridge cases. 8...Converter, 9...Fixed horn, 10...
Tool horn, 11... Welding horn, 13... Cartridge case, 23... Welding part, 31... Coil spring, 32... Adjustment screw. Figure 2 Figure 4

Claims (1)

[Claims] In a disk cartridge manufacturing device, a welding horn driven by a converter is pressed against a plurality of welded parts of upper and lower cartridge cases stacked on top of each other, and vibration energy is applied from the welding horn to join and assemble both cartridge cases. , the integrated converter and welding horn are separately provided corresponding to the welding part of the cartridge case, and the power supply time to the converter and the pressing force of the welding horn against the cartridge case are configured to be individually adjustable. Disk cartridge manufacturing equipment.