JP3133712B2 - Frozen deburring device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a frozen deburring apparatus for removing flash from a flashed product by projecting shot grains on the flashed product.

[0002]

2. Description of the Related Art Generally, this type of deburring apparatus is
As shown in FIGS. 3 and 4, a freezer compartment b having a basket entrance a is provided, and a basket c stored in the freezer compartment b through the basket entrance a of the freezer compartment b. Are put into the freezer compartment b, and in this state, a number of shot grains are projected (shot) into the basket c by a shot mechanism (not shown). Accordingly, the burrs adhering to the product e are peeled off.

In this case, the basket c is attached to a main body door f which covers the basket entrance a of the freezer compartment b. When the basket c is taken in and out of the freezer compartment b, as shown in FIG. a is in the open state.

[0004]

Therefore, as shown in FIG. 4, when the basket entrance a is opened, the outside air flows from above the basket entrance a as shown by an arrow in the freezer compartment b.
Then, the cool air in the freezer compartment b exits from below the basket entrance a as shown by the arrow, and the internal temperature of the freezer compartment b rises. If the internal temperature rises, the following problems occur.

[0005] Since the temperature of the internal air rises sharply with respect to the temperature of the internal wall surface, dew condensation occurs. As a result, shot (projected) shot particles become wet and adhere to the shot particle circulation path. Had a problem with the shot. Since the internal temperature has risen, time is required for lowering the internal temperature to the set temperature again, resulting in poor productivity. As described above, it is necessary to lower the internal temperature again, and therefore, the amount of gas (such as nitrogen gas) used for lowering the temperature increases.

Therefore, when putting the basket in and out,
An object of the present invention is to provide a freezing deburring apparatus that does not allow cold air in a freezing room to escape to the outside and does not cause the above-described conventional disadvantages.

[0007]

In order to achieve the above-mentioned object, a freezing deburring apparatus according to the present invention has a freezing compartment having a freezing compartment main body and a main body door covering a basket entrance of the freezing compartment main body. And a basket housed in the freezer compartment through the basket doorway, and projecting shot grains on the burred product put into the basket in the freezer compartment to remove the burrs of the burred product from the product. And a shot mechanism for peeling, wherein the main body door of the basket entrance of the freezing chamber is opened and the main body door is opened.
A shutter is provided for closing the basket entrance when the attached basket is retracted.

In this case, it is preferable that the shutter is made of a flat plate which moves up and down by a cylinder mechanism and closes the basket entrance of the freezer compartment in its raised state.

[0009]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 shows a freezing deburring apparatus according to the present invention. The freezing deburring apparatus includes a freezing room 1 and the freezing room 1.
And a shot mechanism 3 for projecting a large number of shot particles onto the basket 2 housed in the freezer compartment 1. In addition, a shot grain is a plastic, other nonmetal, or (relatively soft)
Small particles such as metal.

That is, the freezer compartment 1 has a freezer compartment main body 1a and a main body door 7 for closing the basket entrance 5 of the freezer compartment main body 1a.
The freezer compartment main body 1a is provided with guide shafts 6a and 6b for guiding the basket 2 into and out of the freezer compartment 1, and the main body door 7 is connected to the guide shafts 6a and 6b. Have been. The main body door 7 is reciprocated by a reciprocating mechanism composed of a cylinder or the like (not shown) in a direction approaching or leaving the basket entrance 5. In this case, one guide shaft 6a is inserted into a receiving member 9 provided on the upper wall 8 of the freezer compartment 1 so as to be slidable in the axial direction, and the other guide shaft 6b is connected to the side wall of the freezer compartment 1 A receiving member 21 provided at 20 is inserted so as to be slidable in the axial direction. Of course, the number of guide shafts is not limited to two.

A horizontal shaft 10 protrudes from the main body door 7, and a shaft member 11 protrudes from a tip of the horizontal shaft 10, and the basket 2 is held on the shaft member 11. In this case, the basket 2 is rotatable around the axis of the shaft member 11 and rotatable around the axis of the horizontal shaft 10.

That is, as shown in FIG. 1, the basket 2 is set in a state where the opening faces upward, and
A large number of burred products are charged, and the basket 2 is rotated about the horizontal axis 10 as shown in FIG. 2A, and the main body door 7 is slid in this state, and the basket entrance 5 is opened at the main body door 7. In this state, the shot mechanism 3 projects a large number of shot particles (media) onto the basket 2.

The shot mechanism 3 includes a rotatable projection wheel (not shown) provided inside the casing 12, and shot particles from a hopper 13 communicatively connected to the casing 12 are transmitted from the rotating projection wheel. The basket 2 is provided through a projection hole provided in the inclined wall 14 behind the freezer 1.
To project. By the way, the hopper 13 has a circulation path 15
Are arranged in such a manner that shot particles after projection fall to the lower side of the basket 2 and return to the hopper 13 via the circulation path 15.

Further, the freezer compartment 1 is provided with a suction mechanism 22 for sucking cool air in the freezer compartment 1, whereby burrs, dust, shot particles and the like can be sucked. A nitrogen gas for cooling or the like is injected into the freezing chamber 1 by a gas injection mechanism.

The shutter 25 for closing the entrance 5 is provided when the main body door 7 does not cover the entrance 5, that is, when the basket 2 is withdrawn from the freezer 1.
Is provided. The shutter 25 is made of a flat plate, and is moved up and down by a cylinder mechanism 27 erected on a base 26. That is, the piston rod 27a of the cylinder mechanism 27 is attached to the shutter 25, the main body 27b is fixed to the base 26 which receives the device, and the shutter 25 moves up and down as the piston rod 27a expands and contracts.

In this case, a guide frame (not shown) is provided in the freezer compartment 1, and the vertical movement of the shutter 25 is guided by the guide frame. In the illustrated example, the shutter 25 does not block the entire entrance 5, and about 2 /
3 is closed so that the upper part is open.
The whole may be covered.

Next, the flash of the flashed product is separated (removed) from the product by the freezing deburring apparatus configured as described above.
How to do it. First, as shown in FIG. 1, a large number of burred products are put into the basket 2 in a state where the basket 2 is withdrawn from the freezer 1. In this case, since the door 5 of the freezer compartment 1 is not covered with the main body door 7, the shutter 5 closes the door 5. In this freezer compartment 1,
Nitrogen gas or the like for cooling is injected, and the inside of the freezing room 1 is about -15.
It is set to about -30 ° C.

Next, the shutter 25 is lowered and the entrance 5
And the basket 2 is pushed into the freezing chamber 1 (in a state where the basket 2 is slightly rotated around the horizontal axis 10 so as to be able to enter the entrance 5). In this case, the entrance 5 is covered with the main body door 7.

In this state (the opening of the basket 2 faces the projection hole of the shot mechanism 3), the shot mechanism 3 projects a large number of shot grains onto the basket 2. In this case, the basket 2 is rotated around the axis of the shaft member 11, and the shot particles are uniformly projected on the burred product,
Thereby, the burrs are peeled from the product.

Thereafter, the basket 2 is withdrawn from the freezer compartment 1 via the entrance 5 to prepare for the next product with burrs. At this time, the shutter 25 is raised again to close the entrance 5 with the shutter 25. Thereby, the freezer 1
I try not to let the cold inside escape.

That is, since the cool air does not escape, there is no sharp rise in the temperature of the internal air relative to the temperature of the internal wall surface, and there is no condensation. Since there is no dew condensation, the shot particles do not get wet and the circulation of the shot particles is not hindered, and the subsequent shot (projection) can be performed effectively.

In addition, it is possible to prevent the internal temperature of the freezing compartment 1 from rising due to the taking in and out of the basket 2, and it is not necessary to take much time to lower the internal temperature to the set temperature. further,
Since it is not necessary to lower the internal temperature so much, the amount of gas used to lower the temperature can be reduced.

Accordingly, a large number of burred products can be sequentially supplied to the basket 2 and the burrs of these products can be efficiently separated from the products.

Although the shutter 25 slides up and down in this embodiment, it may slide horizontally or swing about a vertical axis. , And the so-called "double doors"
Shape. Further, when sliding in the vertical direction, as in this embodiment, it is preferable that the shutter 25 slides upward from below to close it. this is,
This is because the cool air moves downward, and if the entrance 5 is sequentially closed from below, the cool air in the freezing room 1 does not escape to the outside. Therefore, when the entrance 5 is slid upward from below to close the entrance 5 as in the embodiment, an opening may be formed in the upper portion without closing the entire entrance 5.

[0026]

Since the present invention is configured as described above, the following effects can be obtained.

According to the first aspect, dew condensation in the freezing compartment 1 when the basket 2 is taken in and out is effectively prevented, and the circulation of shot particles and the projection (shot) of the shot particles are hindered. Never come.

[0028] According to the first aspect, during the working process, the internal temperature of the freezing room 1 does not rise so much, so that much time is not required for lowering the internal temperature of the freezing room 1 to the set temperature again. It is possible to efficiently remove burrs from many products.

According to the first aspect, the amount of gas used to lower the internal temperature of the freezing compartment 1 can be reduced, and the cost can be reduced.

According to the second aspect, the same effect as that of the first aspect is obtained, and the escape of the cool air from the basket entrance / exit 5 can be more reliably prevented, and the productivity can be further improved. it can.

[Brief description of the drawings]

FIG. 1 is a side view of a frozen deburring apparatus according to the present invention.

FIG. 2 is a front view of the freezing deburring apparatus.

FIG. 3 is a simplified diagram of a conventional freezing deburring apparatus.

FIG. 4 is an explanatory view of a defect of a conventional freezing deburring apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Freezer compartment 1a Freezer compartment main body 2 Basket 3 Shot mechanism 5 Basket entrance 7 Main body door 25 Shutter 27 Cylinder mechanism

Claims (2)

(57) [Claims] 1. A freezing compartment having a freezing compartment main body and a main body door covering a basket entrance of the freezing compartment main body, a basket stored in the freezing compartment through the basket entrance and exit, and a basket in the freezing compartment. And a shot mechanism for projecting shot grains onto the flashed product put into the apparatus and peeling off the flash of the flashed product from the product. A freezing deburring apparatus, comprising: a shutter for closing a basket entrance when the basket attached to the main body door is retracted when the door is opened. 2. The freezing deburring apparatus according to claim 1, wherein the shutter is made up of a flat plate that moves up and down by a cylinder mechanism to close the basket entrance of the freezing chamber in its raised state.