JPS5921748B2 - Shotplast equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a shot blasting device, and in particular to a shot blasting device that is capable of removing particles formed on the surface of a plastic molded product such as a thermosetting resin in conjunction with a plastic molding machine. Regarding.

Generally, plastic products discharged from a plastic molding machine have a large number of particles around them, so these must be removed. Shot blasting, which projects f-shots, is used.

Conventional shot blasting methods include batch type shot blasting, conveyor/roller type shot blasting, and inclined pipe type shot blasting.

Batch type shot blasting uses a t-shaped cylinder that rotates at low speed.
A workpiece is placed in the workpiece and a shot is applied from an impeller installed diagonally above.
In order to load the workpieces into the cylinder, heavy products may be damaged due to collisions between the workpieces, and all workpieces placed into the cylinder may be damaged. Therefore, there were problems in that it was not possible to remove particles evenly, and furthermore, it was not possible to operate in conjunction with a plastic molding machine.

Conveyor/rotary type shot blasting is a device that applies shots to the workpiece on a conveyor or rotary table (instead, while it is in motion), but this type of device requires a complicated posture control device. It is impossible to remove the burr generated on the workpiece in all directions, and the shot material is shot for a short time, so it is not possible to completely remove the burr.

Furthermore, in inclined pipe shot blasting, the workpiece is introduced from above into an inclined full-mesh pipe, and the pipe is rotated (this allows the posture of the workpiece to be controlled and the workpiece to be conveyed downward). However, there was a limit to the length of the pipe, and the casting time was short, making it impossible to remove a complete drop.

SUMMARY OF THE INVENTION Therefore, the object of the present invention is to improve the drawbacks of the various conventional shot blasting devices described above, to make it possible to project shot material onto a workpiece over a long period of time, and to provide a plastic molding machine that can mold the workpiece. Can be linked with
Providing a shot blasting device that can

In order to achieve the above object, the present invention includes a rotatably supported rotating body, and a spirally mounted rotary body which is spirally attached to an inner circumferential wall from one end plate of the rotating body to the other end plate E of the rotating body. A belt-shaped lead plate forming a groove, a device for driving the rotary cylinder to rotate at a low speed, an input chute for supplying a workpiece to an entrance of a spiral groove in the rotary cylinder, and an outlet of the spiral groove. a hollow impeller shaft rotatably supported at the center of the rotary barrel and equipped with a plurality of shot material projection ports on the peripheral wall; An impeller as an induction fan fixed radially across the projection opening, a device for driving the impeller shaft to rotate at high speed, and a supply pipe for supplying the shot material inside the impeller shaft. , the rotary cylinder and the impeller shaft are installed so as to be inclined with respect to the horizontal direction, and protuberances are formed at a predetermined pitch on at least one force side of the belt-shaped lead plate. It is characterized by

Embodiments of the shot blasting apparatus according to the present invention will be described below with reference to the drawings.

1 and 2 show an embodiment of the shot blasting apparatus according to the present invention, in which the reference numeral 1 in N6 indicates a box-shaped frame, and the lower part of this frame 1 has casters 2 and 2. is installed and is movable.

Inside the frame 1, a rotary cylinder 3 is incorporated which can rotate around a rotation angle @X-X inclined with respect to the horizontal direction.

The rotating body 3 is composed of a body 4, an upper end plate 5, and a lower end plate 6. The upper end plate 5 is supported by the outer periphery of a sleeve 7 fixed to the frame 1. 4 is supported by a bracket plate 8I.

A belt-shaped lead plate 10 is provided inside the body 4 of the rotating body.
are attached in a spiral shape from the lower end plate 6 to the upper end plate 51 at a constant pitch, and a spiral groove 11 is formed between adjacent lead plates 10.

This groove 11 continues in a spiral shape from the lower end plate 6 to the upper end plate 5f with a constant lead angle.

A large outer gear 12 is concentrically attached to the lower end plate 61, and a small pinion gear 13 meshes with the outer gear 12, and the pinion gear 13 is rotated and driven by a motor 14r. As a result, rotating body 3
For example, it is rotated at a rotation speed of 05 to 1.5 rpm.

On the other hand, the opening of the lower end plate 6 of the rotary barrel 3 (this is where the tip of the input chute 15 is inserted from the side), and the other end of this input chute 15 (this is the opening of the plastic molding machine for molding the workpiece W). The discharge port E is connected to the input chute 15 so that the workpiece W with the edges immediately after forming is supplied to the entrance of the spiral groove 11.

Inside this groove 11 (the supplied workpiece W is rotated 111
As the roller 1i13 rotates, it is gradually fed from the inlet of the spiral 411 to the outlet.

During this time, the workpiece W is lifted up to a certain point by the rotation of the cylinder body 4 due to the frictional force between it and the inner circumferential surface of the cylinder body 4, but due to the weight of the workpiece W, the groove 1
The bottom of groove 1 falls down, and then rises and falls repeatedly until it reaches groove 1.
1 from the inlet to the outlet.

Further, according to the present invention, the lead plate 10 includes a second
As is clear from the figure, semi-cylindrical raised stripes 16, 16, . . . , 16 are formed at a constant pitch on at least one surface thereof.

One side of the lead plate 10 has circular holes 17, 17.
．． ...17 are drilled in large numbers.

On the other hand, the inner circumferential surface E of the main body 4 of the rotating drum 3 has a plurality of raised stripes 18, 18 . . . 18 is formed, and a plurality of holes 19° 19, . . . are formed in the body 4.
・No.19 is drilled.

These ridges 16 and 18 effectively act to change the attitude of the workpiece W that is lead-fed as the rotary drum 3 rotates.

That is, the posture of the workpiece W changes when the corners of the workpiece W engage with these raised ridges E.

The holes 17 and 19 are for guiding shot material, which will be described later, projected into the rotary drum 3 out of the rotary drum 3 and returned to the hopper E.

The body 41 near the exit of the spiral groove 11 has an outlet 20 for discharging the deburred product.
A take-out chute 21 is provided at a position that can be aligned with the discharge port 20.

A hollow impeller shaft 22 is provided so as to pass through the center of the rotating barrel 3, and the upper end of the impeller shaft 22 is connected to the sleeve 7E through a bearing 23. The lower end is supported by a bracket 25 on the frame 1 side via a bearing 24.

The hollow impeller shaft 22 has shot holes 26.26. ...26 are drilled.

The projection port 26 is a rectangular hole that is bored at a predetermined pitch all around the impeller shaft 22.
Through this 5 the shot material is fed radially outward.

A plurality of impellers 27, 27, . . . , 27 are arranged radially around the impeller shaft 22,
The projection ports 26, 26. ..., 26 are bored so as to be located between these impellers 27, 27.

A pulley 28 is fixed to the lower end of the impeller shaft 22, and the motor 29 rotates the pulley 28 through a small pulley 30 and a belt 31, so that the impeller shaft 22 is rotated at a high speed of, for example, 3000 to 4000 rpm. (This is happening.

The impeller shaft 22 and impeller 27 are designed to act as an induced blower.

Shot material supply pipes 32 and 33 are connected to the upper and lower ends of the hollow impeller shaft 22, respectively.

Since the shot blasting device according to the present invention is configured as described above, the motor 14 is driven to continuously rotate the rotary cylinder 3 at a low speed via the pinion gear 13 and the outer gear 12, and the injection chute is The workpiece W is supplied from 15 to the entrance of the spiral groove 11.

Then, the workpiece W swings within the bottom of the groove 11 and moves into the spiral groove 11! Feed the lead along this line from the entrance to the exit.

During this time, the impeller shaft 22 is driven to rotate at high speed by the motor 29. At the same time, the shot material is sucked into the impeller shaft 22 through the supply pipes 32 and 33, and from there the shot material is further transferred to the rotating impeller 27. By X
The shot material is scattered in all directions, and the scattered shot material is projected onto the workpiece Wt which is being lead-fed along the groove 11, and the debris on the workpiece W is removed during the lead-feeding.

During this time, the workpiece W is moved by the ridges 16 on the surface of the lead plate 10 or by the ridges 18 on the side of the trunk body 4.
Since the position of the workpiece is constantly changing by being reversed by the workpiece, the shot material is projected all over the surface of the workpiece W, and particles in all directions are removed from this.

The shot material passes through holes 17 and 19 in the lead plate 10 and the trunk body 4, falls downward t, and is returned to the hopper 34.

The workpiece W is then thrown into a take-out chute 21 through a discharge port 20 at the exit of the spiral groove 1.

As is clear from the above description, according to the present invention, a shot material is projected onto the workpiece while the workpiece is being conveyed through the spiral groove between the input chute and the take-out chute. After straining to remove dust, the product discharge port of the plastic molding machine can be connected to enable interlocking operation.

In addition, since the groove for conveying the workpiece is spiral-shaped, it is possible to secure a long conveyance distance within a limited space, and the shot material is projected onto the workpiece for a long time for deburring. You can increase the effect.

Furthermore, since the workpiece changes its posture in various ways while being conveyed along the spiral groove, it is possible to remove debris from all directions of the workpiece.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing an embodiment of a shot blasting apparatus according to the present invention, and FIG. 2 is an enlarged perspective view of section A in FIG. 1...Frame, 3...Rotating body, 4.
...Body body, 5...Upper end plate, 6...
... Lower end plate, 10 ... Lead plate, 11 ...
... Spiral groove, 15 ... Input chute, 16 ... Raised strip, 17 ... Hole,
18... Raised strip, 19... Hole, 20.
...Discharge port, 22...In-plastic shaft, 26
...Projection port, 27...Curved impeller, 32...
... Supply pipe, 33 ... Return pipe, 34 ...
··hopper.

Claims (1)

[Claims] 1. A rotating body rotatably supported, and a spiral l formed on the inner circumferential wall from one end plate of the rotating body to the other end plate.
d a belt-shaped lead plate that is housed in the drum and forms a spiral groove; a device that drives the rotary cylinder to rotate at low speed; a chute, a take-out chute for taking out the processed workpiece from the outlet of the spiral groove; a hollow impeller shaft, an impeller as an induction fan fixed radially on the shaft of the impeller shaft (across the projection port), a device for driving the impeller shaft to rotate at high speed; The rotary cylinder and the impeller shaft are installed so as to be inclined with respect to a horizontal plane, and at least one of the belt-shaped lead plates is mounted in a predetermined position. A shot blasting device characterized in that raised portions are formed at a pitch of A shot blasting apparatus characterized in that a shot material supply pipe is opened at the bottom of a rotary drum, and a shot material supply pipe is disposed at the bottom of a rotating drum.