JPS61125446A - Apparatus for crushing printed circuit board - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a printed circuit board crushing apparatus that crushes scrap produced when a printed circuit board is pressed into chips.

[Technical background of the invention] General printed circuit boards use copper-clad phenolic resin laminates or epoxy resin laminates, but since both are based on thermosetting resin, their bending strength is limited. Remarkably high. Especially when it comes to materials containing glass fiber, it is impossible to bend them.

Therefore, when processing scraps generated when printed circuit boards are press-worked, plate-shaped scraps are collected or transported as they are. Further, when processing the scrap, it is cut by shearing or crushed into chips using a hammer crusher or crusher.

However, as is well known, large press machines and various machine tools are installed at press working sites, so there is a problem in that accumulating the scraps would obstruct the work.

Further, when the process is performed by shearing, there is a problem in that it takes a lot of time and the number of man-hours increases. On the other hand, using a taratsushire reduces the processing time, but this crusher has a propeller-shaped cutter that is rotatably disposed inside a sealed casing, and it rotates at high speed to crush the material to be processed. Because of this, the impact force exerted on the cutter is quite large, which limits its crushing ability from the point of view of protecting the cutter, and it also takes time and effort to maintain and replace the cutter.

Furthermore, in the case of a hammer crusher, the hammer is rotated within a sealed drum to crush the processed material into small pieces, but the vibrations that occur at this time! It is not common because it has a large impact force and the entire device is large.

For this reason, there has been a demand for a scrap crushing device specifically for printed circuit boards, but as far as the inventor knows,
There was nothing that was both general-purpose and high-performance. For this reason, the present inventor previously provided a "synthetic resin board scrap crushing device."

this is,? 1.In the main body connected to a hopper for inputting processed materials, there are a plurality of horizontal shearing mechanisms in which a number of horizontal blades are protruded from the shaft, and a number of vertical blades which are arranged in parallel with the shearing mechanisms and which are arranged in parallel with the shearing mechanisms in the horizontal axis direction and which have a number of horizontal blades protruding from the shaft. In this configuration, a plurality of vertical axis direction shearing mechanisms are provided, and both of them are interlocked.

The above-mentioned "synthetic resin board scrap crushing device" first chops the object to be processed into thin rods of a certain width, and then crushes the same into chips of a predetermined length.

However, when processing the object, shearing or cutting is performed in the vertical and horizontal directions in separate processes, which makes the mechanism complicated and large, which increases costs and requires a large installation space. There was a problem that it had to be done. or,
Although this is a significant improvement over the conventional device, noise and vibration cannot be ignored.

[Objective of the Invention 1] The present invention has been made in view of the above-mentioned problems, and when processing printed circuit board scraps, when the scraps are put into a hopper, a single shearing mechanism is used to remove the scraps. A printed circuit board crushing device that can be shredded into chips, simplifying the mechanism, downsizing the entire device, and making maintenance easier, as well as realizing versatility and low cost. The purpose is to provide the following.

In order to achieve the above object, the printed circuit board crushing device according to the present invention has a plurality of shearing mechanisms rotatably disposed in a main body connected to a hopper, and a shooter below the shearing mechanism.
A motor or the like is provided to drive the shearing mechanism, and the shearing mechanism has a plurality of spur gear-shaped cutters disposed at regular intervals on a pair of freely rotatable shafts, and displaces each tooth by a predetermined angle. The teeth of both shearing mechanisms are made to interlock with each other.

[Embodiments of the invention] Embodiments of the present invention will be described below based on the drawings.

A hopper 2 with an open top is disposed in the upper part of the main body 1 formed in a picture-like shape, and a workpiece to be processed, that is, scraps of printed circuit boards (hereinafter referred to as scraps) 3 is placed from above the hopper 2. The hopper 2 falls into a chute 4 provided below the main body 1.
Directly below, there are multiple pruning l! It is equipped with 5 Fi 11 structures.

The structure of the shearing mechanism 5 is that a pair of shafts 6 are horizontally installed in parallel inside the main body 1, and both ends of the shafts are connected to the national polity 1.
The shafts 6 are supported by bearings 7 disposed on the sides thereof, and are rotatable. A large number of spur gear-shaped cutters 8 are fixed at regular intervals to each of the shafts 6. The cutters 8 are shifted from each other so that they engage with each other leaving a predetermined clearance.

That is, the scrap 3 that has fallen onto the shearing mechanism 5 is
This double force vine 8 is sheared and crushed by the force 1119.

The teeth 9 of the cutter 8 are each displaced by a predetermined angle from the adjacent teeth 9 in the direction of rotation of the shaft, so that the entire tooth row is twisted as shown in the figure. With this configuration, when shearing the scrap 3, a large number of m9 engage in sequence, and the scrap 3 can be gradually crushed.

A driven gear 10 is connected to one of the bearings 7, and a planetary gear (shown in the figure) that rotates in mesh with the other bearing 7 is attached to the other bearing 7. ) The J gear 10 is connected via a chain 12 to a motor 11 fixed to the bottom of the main body 1, and when the driven gear 10 rotates, both shearing mechanisms 5 are engaged with each other via planetary gears and the shafts are rotated. It is designed to rotate.

A cover (not shown) is attached to the front surface of the main body 1, and crushed scraps 3 can be discharged from an opening provided in the cover.

Next, the operation of the printed circuit board crushing device having the above configuration will be explained.

First, when the motor 11 is driven and the driven gear 10 is rotated clockwise via the chain 12, the planetary gears are also rotated counterclockwise in conjunction with this, and the plurality of shearing mechanisms 5.
5 rotates in the direction of the arrow as shown in the figure, and the teeth 9 are brought into occlusion leaving a predetermined clearance.

In this state, the scrap 3 that has been thrown in from the hopper 2 and has slid down into the main body 1 is caught between the cutters 8 of both shearing mechanisms 5.5, and is sheared by each tooth 9.

Therefore, each tooth 9 does not all occlusion at once, but each occlusal phase is sequentially displaced, so even if a large scrap 3
Even if it is, it can be sequentially sheared starting from the end, and it can be reliably crushed into chips without requiring a large shearing force.

Furthermore, since the shearing force of the adjacent teeth 9 is sequentially applied to the scrap 3 on each tooth 9, the stress on the tooth 9 is also dispersed, so that the scrap 3 is made of glass fiber. Even with thick copper-clad printed circuit boards made of epoxy resin or silicone resin, the teeth 9 can be prevented from being damaged.

Incidentally, the scrap 3 crushed into chips is sent to the shooter 4.
It falls to the bottom and is ejected out of the cover's outlet under its own weight.

[Effects of the Invention] As described above, according to the present invention, a shearing mechanism in which a large number of teeth are arranged in a twisted manner is rotated in occlusal manner while leaving a predetermined clearance from each other, and scrap is caught between the rows of teeth. Therefore, even if it is a scrap of a highly rigid printed circuit board, it can be crushed into chips using a relatively light shearing force, and the overall mechanism is also simplified. It has the remarkable effect of being able to be miniaturized, occupying less space, and solving installation problems.

[Brief explanation of the drawing]

Each figure relates to an embodiment of the printed circuit board crushing device of the present invention, and FIG. 1 is an overall perspective view of the device with the cover removed, and FIG. 2 is a main part of the device. FIG. 3 is a partial perspective view showing the structure of the shearing mechanism, and FIG. 3 is a plan view of the cutter.

Claims (1)

[Claims] A shearing mechanism has a large number of spur gear-shaped cutters arranged at regular intervals on a freely rotatable shaft, and the teeth of each cutter are displaced by a predetermined pitch in the direction of shaft rotation, so that the entire tooth is twisted. A plurality of cutters are installed in parallel in a main body connected to a hopper, and both shear mechanisms are interlocked so as to rotate inwardly, so that each cutter rotates in occlusion leaving a predetermined clearance. Printed circuit board crushing equipment.