JP3924312B2 - Blasting equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a blasting apparatus for processing a surface by spraying a powdery blast material made of alumina or the like onto a workpiece by placing it on a high-speed gas flow from a blast nozzle. More specifically, the present invention relates to an improvement of a work door device for taking a work into and out of a blast processing chamber.
[0002]
[Prior art]
The operation of loading and unloading the workpiece with respect to the blasting chamber in the blasting apparatus is performed via an open / close door provided outside the peripheral wall portion forming the blasting chamber. That is, as a conventional open / close door, a sliding type configured to open and close by sliding vertically or laterally along the outer surface of the opening for the work passage formed in the peripheral wall portion of the blasting chamber. The door was generally used. However, in the case of this conventional open / close door, since the blasting material or processing debris that scatters during processing tends to adhere to the surface of the open / close door facing the blasting chamber side, the sliding surface is used when the door is opened / closed. There were problems such as blasting material entering and reducing the sealing function, or falling outside the processing chamber and soiling the surroundings. The blasting chamber is generally set to a negative pressure during processing to prevent leakage of the blasting material. Therefore, when the door is opened and closed especially during processing, differential pressure acts on the door. So there was a problem with its operability.
[0003]
[Problems to be solved by the invention]
This invention is invented in order to solve the above conventional problems, and it aims at solving the fall of the blasting material etc. to the outdoors at the time of opening and closing of the workpiece door installed in the blasting chamber. . Another object is to improve the operability of the door. It is another object of the present invention to improve the sealing function by reducing the amount of blasting material and processing waste adhering to the vicinity of the opening and closing door, and to further prevent the blasting material and the like from falling outside the room.
[0004]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention provides an opening for a work passage formed in a peripheral wall portion of a blasting chamber, and an open / close door is opened and closed by a contact / separation operation from the inside to the opening for the work passage. A protective cover disposed above the opening in the blasting chamber, a side auxiliary cover provided between a side portion of the protective cover and a peripheral wall of the blasting chamber, and the protection A technology that provides a gas supply means for supplying air or the like below the cover so that the blasting chamber has a negative pressure during blasting and the space surrounded by the protective cover and the side auxiliary cover has a slightly positive pressure. Adopted means. As described above, by installing the upper protective cover of the opening, is provided with the gas supply means for supplying air or the like in the space below the protective cover, opening and closing the blow gas before opening the door It is possible to prevent the blast material or the like adhering to the vicinity of the door from being blown off and falling when the door is opened. Further, since the blasting chamber is set to a negative pressure and the space below the protective cover is set to a slightly positive pressure at the time of blasting, it is possible to prevent the blast material or the like from entering the vicinity of the open / close door. In that case, a side auxiliary cover is provided between the side portion of the protective cover and the peripheral wall portion of the blasting chamber, and a partition is also formed on the side surface of the space portion below the protective cover. The amount of blasting material or the like attached to the door can be reduced more effectively, and the effect of supplying air or the like from the gas supply means can be more effectively exhibited. In addition, since the open / close door for the work passage is configured to open and close by the contact / separation operation from the inside with respect to the opening, the problem that the blast material or the like falls outside the processing chamber is almost eliminated. If the opening / closing door is configured to be opened and closed by a swinging operation, a smooth opening / closing operation with respect to the opening can be obtained.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
The present invention is suitable as an open / close door in blast processing requiring large and high precision, such as when blasting is adopted as a rib forming method of a glass substrate used in a large PDP, that is, a plasma display panel. However, it can be applied to other cases as long as it is installed in the blasting chamber. Moreover, it does not specifically limit regarding the kind of blast material, It is applicable when using various blast materials, such as an alumina. Furthermore, it is also suitable when low-pressure air is used as blast air for blowing the blast material from the blast nozzle. Needless to say, the door device for the workpiece may be used exclusively for the entrance or exit, or may be used for loading and unloading the workpiece for entrance and exit.
[0006]
As described above, the opening / closing door may be installed in any space as long as it is installed in the space below the protective cover and can be protected from the adhesion of a blast material or the like, and the adhesion amount can be reduced. The door can be opened and closed as long as the door is opened or closed by contacting or separating the opening from the inside of the blasting chamber to the opening for the work passage. For example, in the case where the opening / closing door is opened and closed by swinging as in the embodiment described later, the door portion that comes in contact with and separates from the opening only needs to be inside the blasting chamber. The swinging means for swinging may be disposed outside the blasting chamber. Needless to say, it may be configured to mechanically open and close using a drive means such as a drive cylinder. Further, by attaching a packing material such as rubber to the joint surface between the opening and the opening / closing door, the sealing function between them can be improved.
[0007]
The gas supply means for supplying air or the like to the space below the protective cover when opening the open / close door may be configured to blow out using compressed air or the like led from a pressure air supply source, It may be configured such that air or the like is supplied using the pressure difference inside and outside the blasting chamber. In that case, if the outlet for air or the like is installed so as to face the contact surface between the opening and the open / close door, it is extremely effective in improving the maintenance of the sealing function.
[0008]
Further, as described above, a side auxiliary cover is provided between the side portion of the protective cover and the peripheral wall portion of the blasting chamber, and a partition is formed on the side surface of the space portion formed below the protective cover. Since it forms, the adhesion amount of the blast material etc. with respect to the opening-and-closing door vicinity can be reduced more effectively, and the effect of supply of the air etc. from the said gas supply means can be exhibited more effectively. In this case, the protective cover is configured to be rotatable and a bellows-shaped auxiliary cover is used as a side auxiliary cover, so that when the door is sealed, the protective cover is rotated downward along the door. It is also possible to reduce the occupied space by moving and rotate upward when the opening / closing door is opened so that the opening / closing operation of the opening / closing door is not restricted. That is, the protective cover can be configured to be able to rotate according to the open / close state of the door.
[0009]
【Example】
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic configuration diagram showing a main part of a blasting apparatus according to the present invention. In the figure, reference numeral 1 denotes a blasting chamber. A blast nozzle 2 is installed inside the blasting chamber 1, and compressed air is supplied through the air supply pipe 4 with blast particles supplied via a blasting material supply pipe 3. It is configured to perform blasting by spraying the workpiece 5 on a high-speed airflow such as. The present invention relates to a workpiece door device for carrying the workpiece 5 into the blasting chamber 1 and for carrying out a workpiece that has been machined out of the blasting chamber 1. A recovery device such as a cyclone separator (not shown) is connected to the bottom of the blasting chamber 1 through a recovery pipe 6 to remove impurities such as processing waste from the used blasting material recovered as necessary. And can be reused.
[0010]
FIG. 2 is a partially enlarged view showing a main part of one embodiment according to the present invention. In the figure, reference numeral 7 denotes a peripheral wall portion of the blasting chamber 1. As shown in the drawing, a portion of the peripheral wall portion 7 corresponding to the conveying roller 8 for transferring the workpiece 5 has an opening 9 for a work passage. Is formed. Note that L indicates the conveyance level of the workpiece 5. A protective cover 10 is installed in an inclined shape above the opening 9, and a side auxiliary cover 11 is provided between the side walls and the peripheral wall 7 of the protective cover 10. A space 12 that is protected from adhesion of a blast material or the like is formed below the protective cover 10. In the present embodiment, the protective cover 10 is fixed to the peripheral wall portion 7 with screws 13, but as described above, the protective cover 10 is rotatably supported with respect to the peripheral wall portion 7, and according to the open / close state of the open / close door. And may be configured to be able to rotate. In that case, in order to allow the protective cover 10 to rotate, a bellows-shaped one is used as the side auxiliary cover.
[0011]
The opening / closing door 14 is configured to be able to contact and separate from the inside of the blast chamber 1 in the opening 9 for the work passage. Rubber joints 15 and 16 are attached to the joint surfaces, and the adhesion between them is improved. The open / close door 14 is supported by a swing arm 17 so as to be swingable about a support shaft 18. A drive arm 19 is fixed to the support shaft 18, and the opening / closing operation is performed by swinging the door 14 around the support shaft 18 by the drive cylinder 20 via the drive arm 19. It is configured. Further, an air supply pipe 21 for supplying air to the space portion 12 is installed on the peripheral wall portion 7 of the blast processing chamber 1, and is configured to supply compressed air from an air supply source (not shown). In the figure, 22 is a bearing portion of the support shaft 18 installed on the peripheral wall portion 7, 23 is a connecting portion for fixing the swing arm 17 and the open / close door 14, 24 is an output shaft of the drive cylinder 20, 25 These show the support member of the drive cylinder 20 installed in the surrounding wall part 7. FIG.
[0012]
Thus, when the work 5 is carried into or out of the blasting chamber 1, compressed air is supplied to the space 12 formed below the protective cover 10 via the air supply pipe 21. At the same time, the drive cylinder 20 is driven to move the output shaft 24 downward, and the open / close door 14 is rotated about the support shaft 18 as indicated by an arrow through the drive arm 19 and the swing arm 17. To open the opening 9. When loading or unloading of the workpiece 5 is completed, the drive cylinder 20 is driven to move the output shaft 24 upward, and the opening / closing door 14 is rotated around the support shaft 18 in the reverse direction to open the opening 9. To seal. As described above, the open / close door 14 of the present invention performs the contact / separation operation with respect to the opening 9 from the inside of the blasting chamber 1.
[0013]
【The invention's effect】
According to the present invention, the following effects can be obtained.
( 1 ) Before opening the opening / closing door, it is possible to prevent contamination by dropping of the blasting material and the like when the opening / closing door is opened by blowing off the blasting material adhering to the vicinity of the opening / closing door by blowing gas. And since the gas supply means was provided under the protective cover, the effect of the gas supply can be exhibited more effectively.
(2) the space beneath the protective cover together during blasting the blasting chamber to a negative pressure since the slightly positive pressure, it can be prevented from entering the door near the blast material, or the like.
( 3 ) Since the open / close door is configured to open and close from the inside of the blasting chamber, the problem of blasting material falling outside the processing chamber and soiling the surroundings is solved.
( 4 ) Since the open / close door is disposed in the space below the protective cover, the amount of blast material or the like attached to the vicinity of the open / close door can be greatly reduced .
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram showing a main part of a blasting apparatus according to the present invention.
FIG. 2 is a partially enlarged view showing a main part of one embodiment according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Blast processing chamber, 2 ... Blast nozzle, 3 ... Blasting material supply pipe, 4 ... Air supply pipe, 5 ... Workpiece, 6 ... Recovery pipe, 7 ... Perimeter wall part of blasting chamber, 8 ... Conveyance roller, 9 ... Work path 10 ... protective cover, 11 ... side auxiliary cover, 12 ... space, 13 ... screw, 14 ... open / close door, 15, 16 ... rubber packing, 17 ... swing arm, 18 ... spindle , 19 ... Drive arm, 20 ... Drive cylinder, 21 ... Air supply pipe, 22 ... Bearing part, 23 ... Connection part, 24 ... Output shaft, 25 ... Support member

Claims (2)

In a blasting apparatus that performs processing by spraying a blast material from a blast nozzle onto a work by applying it to a work, an opening for a work passage is formed in the peripheral wall of the blasting chamber, and the opening is in contact with the opening from the inside. An opening / closing door is disposed so as to be opened and closed by a separation operation, and is provided between the protective cover, the side portion of the protective cover, and the peripheral wall portion of the blasting chamber above the opening in the blasting chamber. A side auxiliary cover and a gas supply means for supplying air or the like below the protective cover are provided, and the blasting chamber is made negative pressure during blasting and is surrounded by the protective cover and the side auxiliary cover A blasting machine characterized in that the space is slightly positive . Blast pressure KoSo location according to claim 1, characterized by being configured to open and close by swinging operation of the door.

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