JPS639949B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention includes a rotary drum having a polygonal inner circumferential surface installed in a hood so as to be tilted so that it can be rotated forward and backward. A batch type with a flip-up revolving door attached to the machine frame when discharging, and a projection unit that can be moved laterally to the outside of the upper end of the drum to improve the cleaning effect. This invention relates to continuous shot blasting equipment.

Various improvements have been made to this type of device in the past, and the configuration of the most commonly used one is that a cylindrical rotating drum is placed horizontally or slightly inclined on a rotating roller. The inner barrel surface from the rear half of the rotary drum to the discharge port is equipped with a helical high lead, and the inner barrel surface of the front half of the rotary drum is equipped with a large number of small reeds to facilitate the reversal of the object to be ground. This is constructed by fixing the projecting piece and fixing the projection unit to the upper part of the inlet side of the rotating drum. However, in a device having such a configuration, in order to prevent the abrasive material projected toward the object to be polished from scattering to the outside, this is achieved by using a spiral lead installed in the rear half of the rotating drum. However, this is not a very perfect sealing method, and the steel balls that are diffusely reflected inside the drum often scatter outside, creating a dangerous situation.Also, the material to be polished is introduced from the inlet side, which is one side of the rotating drum. When grinding from a projectile while rolling the object, the rolling of the object is due to small protrusions fixed to the inner surface of the rotating drum, so it depends on the shape of the object. is difficult to roll, and since the projection unit is fixed, the projection pattern of the abrasive material is uniform, which tends to cause uneven polishing and uneven wear inside the drum. Generally, there is no drum cover, so the rolling noise of the object to be polished and the collision sound of the projectile material reverberate greatly within the drum, creating a source of noise, and there are still various problems that need to be improved. be.

The present invention was created in order to solve this problem, and the discharge port of the rotating drum is equipped with a rotating door that rotates together with the drum to completely prevent the steel balls from scattering to the outside. When discharging the object, this door is flipped up to facilitate ejection of the object to be polished.Furthermore, in order to improve the rolling of the object to be polished within the rotating drum, the inner peripheral surface of the drum is made polygonal. The projection unit can be moved laterally so as to project the steel balls at a precise position toward the rotating object to be polished, which is inserted into the drum, and the drum can be rotated in forward and reverse directions without causing uneven polishing. Correspondingly, the projection unit moves laterally to increase the abrasive effect, which in turn prevents uneven wear of the lining stuck inside the drum, and furthermore, the entire rotating drum is accommodated in the hood. This is an extremely useful device that has been devised in various ways to reduce the noise by preventing it from leaking outside.

An embodiment of the present invention will be described based on the accompanying drawings. The inner circumferential surface 1 is polygonal, and small holes 2, 2 are formed around each of the inner circumferential surfaces 1 and 2 for discharging the steel balls and the foundry sand that has adhered to the object to be polished. A rotating drum 3 having an appropriate number of transparent holes is formed, and rails 4, 4' are wound around the outer circumferential surface of the rotating drum 3, and the rails 4, 4' are arranged at an angle on a machine base 6 inside a hood 5. Rollers 8, 8', 9, which are attached to rotating shafts 7, 7' that can be rotated in forward and reverse directions.
An arm 12' is disposed on the machine frame 12 to enable the rotary drum 3 to rotate in forward and reverse directions, and is rotatably pivoted on the machine frame 12 to the operating rod 11 of the cylinder 10 fixed on the hood 5. A revolving door 13 is connected to the upper end and rotatably pivoted to the lower end thereof, and this revolving door 13 opens and closes the discharge port 14 at the lower end of the rotary drum 3 by flipping up. When it does, it should be able to rotate together with the rotating drum 3.
Further, a sliding plate 18 with a motor 16 and a projection unit 17 attached thereto is fitted into a fixed plate 15 fixed to the outer surface of the hood 5 outside the upper end of the rotating drum 3, and is also attached onto the fixed plate 15. The operating rod 20 of the cylinder 19 is connected to the sliding plate 18 so that the projection unit 17 can be moved laterally, and in the figure, 21 and 21' are conveyors for collecting shot, and 22 is the object to be polished. input vibration feeder, 23
is a bucket elevator, 24 is a separator,
25, 25', 25'' are guide rollers.

The present invention is constructed as described above, and the illustrated polygonal rotating drum 3 is 16-sided, but this may be a polyhedron that easily rolls depending on the size and shape of the object to be polished. rollers 8, 8', 9, and
These rollers 8, 8', 9,
The rotation of 9' enables the rotating drum 3 to rotate in forward and reverse directions, thereby allowing the most efficient projection of the abrasive material toward the group of objects to be polished that remain and roll in the direction of rotation of the drum 3. This allows the unit 17 to move laterally. That is, if the rotary drum 3 rotates to the right, the object to be polished thrown into the drum 3 rolls while staying above the left bottom circumferential surface of the drum 3. The projection unit 17 is moved to the left side so as to most efficiently project the abrasive material toward a group of objects, and the abrasive material is polished for a certain period of time. When cleaning objects, etc., in order to eliminate uneven cleaning, rotate the rotary drum 3 to the left, move the projection unit 17 to the right, and continue cleaning for a certain period of time to reduce the rotational speed of the drum. Coupled with the variableness of , it is possible to uniformly clean the object to be polished without any unevenness no matter what shape the object is to be polished. Furthermore, since the revolving door 13 that closes the discharge port 14 at the lower end of the rotary drum 3 is rotatably attached to the lower end of the arm 12', the rotation door 13 closes the discharge port 14 at the lower end of the rotary drum 3. The rotating door 13 completely closes the discharge port 14 of the rotating drum 3 to prevent scattering of steel balls to the outside due to diffused reflection.
It also rotates forward and backward, and when the cleaning is finished, cylinder 1
0, the arm 12' flips up the revolving door 13 and opens the ejection port 14 of the rotary drum 3, thereby easily ejecting the polished object.

Although the present invention is easier to manufacture than the conventional large cylindrical rotating drum, the entire polygonal rotating drum 3, which has a large rolling effect, is tilted at a certain angle and disposed inside the hood 5. In addition to reducing the noise during cleaning, the forward/reverse direction and rotational speed of the rotary drum 3 are varied depending on the shape of the object to be polished, and the projection unit 17 is adjusted in accordance with the locus of rotation of the group of objects to be polished. By moving horizontally, a uniform cleaning effect without unevenness can be obtained, and moreover, the rotating door 13 can accurately close the rotating drum 3 when cleaning and discharging the object to be polished.
This is an extremely useful device that has various effects that have not been seen before, such as closing or opening the discharge port 14 of the device.

[Brief explanation of the drawing]

Figure 1 is a front view of the present invention, Figure 2 is Figure 1A-
FIG. 3 is a partially cutaway enlarged front view of the main part, FIG. 4 is a cutaway end view taken along line B--B in FIG. 3, and FIG. 5 is an enlarged view of the projection unit. In the figure, 1...inner peripheral surface, 2, 2'...small hole, 3...
...Rotating drum, 4,4'...Rail, 5...Hood, 6...Machine base, 7,7'...Rotating shaft, 8,8',
9, 9'...Roller, 10,19...Cylinder, 11,20...Operating rod, 12...Machine frame, 1
2'... Arm, 13... Rotating door, 14... Outlet, 15... Fixed plate, 16... Motor, 17...
...Projection unit, 18...Sliding plate.

Claims (1)

[Claims] 1. A rotating drum with a polygonal inner circumferential surface and an appropriate number of small holes perforated around each of its peripheries is formed, and a rail is wound around the outer circumferential surface of this rotating drum, and this is tilted onto the machine stand inside the hood. The rotary drum is arranged between the rollers attached to a rotating shaft so that it can rotate forward and backward, and the rotary drum can be rotated forward and backward, and then on the operating rod of the cylinder fixed on the hood, The upper end of the arm that is rotatably attached to the machine frame is connected to the machine frame, and the revolving door that is rotatably attached to the lower end of the arm is connected, and this revolving door bounces off the discharge port on the lower end side of the rotating drum. When opened by raising and closed, it can rotate together with the rotating drum, and a sliding plate with a motor and projection unit attached to a fixed plate fixed to the outer surface of the hood outside the upper end of the rotating drum. A batch-type continuous shot blasting device characterized in that the operating rod of the cylinder attached to the fixed plate is connected to the sliding plate so that the projection unit can be moved laterally.