JPS58207966A - Apparatus for recovering powdery coating body - Google Patents

Abstract

PURPOSE:To continuously and efficiently separate an accumulated powdery body, by providing an apparatus for separating a powdery body equipped with a powder-sucking opening at the side of the surface of filter cloth on which the powdery body is accumulated and an air-spray nozzle at the other side in a booth, and relatively moving said apparatus against the filter cloth. CONSTITUTION:An excess powdery body A sent together with an air stream through a duct 2 into a recovering machine 3 is pulled and accumulated on the outer surface of filter cloth 6 by the inspiring motion of an exhaust fan 8. When the surface of said accumulation is moved to the side of an apparatus 10 for removing a powdery body by the rotation of an inner cylinder 5, the accumulated powdery body A is knocked down by the inter-mittent spray of air through a spray nozzle 11 mainly, and the knocked-down powdery body A is concurrently sucked and recovered through a powder-sucking opening 12. The vibration formed by the intermittent spray of air through the spray nozzle 11 assures to separate and recover the powdery body from the filter cloth 6 with a stabilized air stream inside the wind-shielding covers 13, 14 surrounding the spray nozzle 11 and the powder-sucking opening 12.

Description

[Detailed Description of the Invention] The present invention is to collect excess powder that does not reach the object to be coated among the powder discharged from the gun in the coating machine for powder such as electrostatic powder twisting. Regarding equipment.

As shown in Fig. 1, the powder mixed with the air from the booth a is sent through the exhaust fan ff1lc, through the exhaust duct c, and into the recovery machine d.
The powder is collected on the outer surface of the cloth material provided in the collection machine d, or a bell consisting of a cloth material that moves in one direction to the bottom of the booth a as shown in Fig. 2. The body is collected and collected on the bell) f and the collected material is inhaled through the intake port g for another collection 45! A separate type is known in which the air is collected together with air.

However, in the former case, it becomes necessary to remove the accumulated powder accumulated on the outer surface of the cloth member. In order to perform this powder removal while continuing powder twisting, it is necessary to separate the inside of the recovery machine d into multiple chambers and cut off communication with the booth in only the chamber that is to be used for powder removal. As a result, there were concerns that the collection machines would become larger and more complex.

In the latter case, the accumulated powder is continuously suctioned and removed by the suction port, but not all the powder is completely suctioned, and especially the very fine powder may not end up inside the fabric member. Next, after a long period of operation, the mold must be washed, the coating must be stopped, and the static pressure at the powder suction port must be increased to remove the powder from the fabric member. In particular, as the particle size of powder coating materials has become finer in recent years, this problem has become a major bottleneck in the operation of powder coating equipment.

The object of the invention is to obtain a collection device which does not have such inconveniences, and in a powder coating booth deposition type, pressurized air is intermittently applied to the surface opposite to the deposition surface of the fabric member. Powder separation device i-powder coating booth, which consists of an injection nozzle that sprays particles, a suction port that faces the deposition surface, and a wind shield that surrounds both of these to stabilize the airflow. Alternatively, it is characterized in that it is provided in a subsequent recovery machine, and the separation device and the cloth member are moved relative to each other.

Figures 3 and 4 show the present invention applied to the above-mentioned series arrangement type, in which excess powder A generated in the booth 11+ is
Collected with airflow via rI duct (2)* (3
It is inhaled within 1.

The IM+31 is equipped with an inner cylinder (5) rotatably supported within the outer cylinder (41), and the intraocular cylinder (5) has a cloth member (6) such as felt, woven fabric, or non-woven fabric on its side. and is airtightly supported between the inner cylinder (5) and the Fi outer cylinder (4) via a labyrinth backing (7).

(8) is a duct (9;
The surplus powder A sent into the collector (3) along with the airflow through the duct (2) is drawn into the cloth member by the suction by the exhaust fan (8). Deposits on the outer surface of (6).

The figure shows a powder separator 1 installed in a collection machine (3) for separating the condensed powder from a cloth member (6), and the powder separator! (I
Q+ is the reflective surface of the deposition surface of the cloth member (6), that is, the inner cylinder (5)
an injection nozzle aD that intermittently injects pressurized air facing the cloth member (6) from the inner surface of the cloth member (6); (L
A tailwind and (131 (14)) are provided surrounding the 2+ to stabilize the airflow, and the injection nozzle aυ゛
The cloth member (610) is constructed by attaching a large number of injection ports (11b) to the side of the pipe (11) along the rotation axis direction, and the powder suction port α21 is a slit-shaped structure along the same direction as the direction of the injection (1l b). It was composed of the following.

The cylinder (5;) is driven and rotated by a shaft (151) protruding downward from the lower center thereof in conjunction with an external drive source 4.

Note that (17) shows a falling powder receiver that receives the separated powder. In this way, the waste is passed through the duct (2) to the collecting machine (3).
The powder A supplied into the inner cylinder (510) is attracted to the outer surface of the cloth member (6) by the suction force of the exhaust fan (8), and
Due to the rotation, the deposition surface moves toward the powder separator Ue side. Then, the deposited powder Ai is knocked off mainly by intermittent air injection from the injection nozzle aυ, and at the same time, the thrown-off powder A is sucked and collected by the powder suction port Q21.

The vibrations caused by the intermittent spray from the spray nozzle Qυ extend to other parts of the cloth member (6) and shake off the accumulated powder.

This powder A falls at the bottom of the outer cylinder (5) and the powder receptacle is stopped at the top.

The one shown in FIG. 5 shows an embodiment of a separate arrangement type, in which an endless belt-like cloth member (61) is provided at the bottom of the booth (1) and moves horizontally (Powder separator r similar to the previous E configuration at one end of 6)
kLGo+ 'ir h Then, the VC was set to collect the powder deposited on the cloth member (61. That is, the powder separator 01
An injection nozzle (a) that intermittently spouts out air, which constitutes a metal cloth filter (6), faces the circle of the injection nozzle (III) and has a powder suction port (6-) on the upper surface of the cloth member (6-).
1214r is installed, and by these steps, the same material as above is used.
+ Powder that accumulates on the top is now collected.

In this case, a tip (12a) made of an abrasion-resistant material such as Teflon was provided on the surface of the powder suction port a that comes into contact with the cloth member (6).

In this embodiment, the powder on the cloth member (6) is mainly separated and collected by suction using the powder suction port (6).
This is to reduce the contact resistance between 121 and the cloth member (6).

The 513th! ! In the embodiment 11, the cloth member (6) is shaped like an endless belt and moves in the horizontal direction.
) is fixed to the bottom of the booth (1), and the powder separator (
1(b) may be moved along the cloth member (61).

In this way, according to the present invention, an injection nozzle that intermittently injects pressurized air onto the surface opposite to the powder deposition surface of the cloth member, a powder suction port facing the deposition surface, and a material surrounding the artist are provided. A powder separation device consisting of a wind shield plate to stabilize the respective airflows was installed in the powder coating booth, and the separation electricity was moved relative to the cloth member and the metal, so that there was no intermittent air flow from the injection nozzle. The air injected into the cloth member knocks off the powder that has accumulated from the opposite side of the powder accumulation surface, and at the same time sucks it in through the powder suction port, so that the powder that has accumulated on the cloth material is continuously removed. It is possible to keep the surface of the cloth member clean at all times by separating and removing it, and there is no inconvenience such as having to stop the mounting device to clean the cloth filter as seen in the conventional example. By providing a wind shield & to surround 8 and stabilize the respective airflows, the airflows of both 1 and 1 are not disturbed and the separation and recovery can be performed centrally.

[Brief explanation of drawings]

Fig. 1 and Fig. 2 are side views of the conventional example device, Fig. 5 is a cut side view of one example of the non-inventive Toshi. Fig. 6 is an enlarged cross-sectional view of a part of the tuna. (11...Powder electrical equipment booth +3+...Collection machine (6)...Cloth filter material (101...Powder separator aυ...Spray nozzle (121...Powder suction port patent application) Person: Matsuo Sangyo Co., Ltd. Representative: Kin Kitamura - 2 others

Claims (1)

[Claims] In a type in which a cloth filter made of textile material is completely installed in a powder coating booth or a subsequent recovery machine, and excess coating powder is deposited on the cloth member by air flow, An injection nozzle that intermittently injects pressurized air to the opposite side of the accumulation surface of the fabric member, a powder suction port that faces the accumulation surface, and a wind shield grip that surrounds both of these to fully stabilize the respective airflows. A powder separation device for coating is provided in a powder coating booth or in a recovery machine following this. .