WO2023119377A1

WO2023119377A1 - Powder spraying device

Info

Publication number: WO2023119377A1
Application number: PCT/JP2021/047091
Authority: WO
Inventors: 考志東谷; 契二高橋
Original assignee: ニッカ株式会社
Priority date: 2021-12-20
Filing date: 2021-12-20
Publication date: 2023-06-29

Abstract

Provided is a powder spraying device with which the work of replacing an electric discharge wire is easy, which can decrease the frequency of replacement, and which enables stable spraying of a powder by stable electric discharge. This powder spraying device 10 of the present invention includes: a spraying unit 20 provided with a powder storage tank 22, a spraying roller 24, and an electric discharge wire 26; two scattering prevention rollers 32 that are disposed upstream and downstream directly below the spraying unit to form a spraying closed space 13 between the rollers and, also, are disposed with a gap with respect to a spraying target and are forcibly rotated; and a device stand 12. In the powder spraying device 10 that sprays a powder on the spraying target that passes below the scattering prevention rollers 32, an electric discharge ware 34 is attached to each of the two scattering prevention rollers 32; the spraying unit 20, and the downstream and upstream scattering prevention unit 30 including the scattering prevention rollers 32 and the electric discharge wire 34 are movable to an operating position near each other and to a maintenance position away from each other; and at the maintenance position, a replacement space for the electric discharge wires 26, 34 is provided.

Description

powder sprayer

In the present invention, in order to prevent adhesion (blocking) between wound laminates, plastic films, rubber sheets, etc., and to improve slipperiness in subsequent processes, powder is applied to the surfaces of plastic films, rubber sheets, etc. It relates to a powder spraying device that sprays.

There is a powder spraying device that sprays powder for preventing blocking and improving slipperiness (see Patent Document 1). FIG. 7 is an explanatory diagram of a conventional powder spraying device. FIG. 8 is an explanatory diagram of a discharge wire attached to a conventional anti-scattering roller (excluding a spraying unit).

Discharge wires

26 and 34 are arranged in close proximity to the peripheral surface of the roller directly below the spreading roller 24 and obliquely below the scattering prevention roller 32 of this device. The

discharge wires

26 and 34 are connected to a high-voltage AC power supply by flexible wires whose conductors are coated with an insulator, and the powder carried downward by the spray roller 24 is discharged from the discharge wires 26. Release. At that time, the powder adhering to the anti-scattering roller 32 is released by the discharge from the discharge wire 34, and the powder can be sprayed on the upper surface of the object to be sprayed, such as a plastic film or rubber sheet moving under the anti-scattering roller 32. . Conventionally, the discharge wire 34 of the two anti-scattering rollers 32 has been replaced by a single long discharge wire between the two anti-scattering rollers 32 in order to save installation space and reduce the equipment configuration. 17 and arranged in a U-shape (see FIG. 8). However, conventional powder sprayers have the following problems.

(1) The discharge wire has a fastener and a coil spring at one end, is fitted into the mounting groove, is bent using a plurality of pulleys 17 (in the case of the discharge wire 34), and is attached to the fastener by tightening the fixing screw on the other end side. A coil spring can be held in a compressed and taut state between the wall surfaces of the groove. When the discharge wire 26, especially 34, which is attached to the device in a tensioned state, is stretched due to deterioration over time due to the application of a high voltage, the contracted coil spring loosens and the spring pressure cannot be applied, and the original tensioned state cannot be maintained and the wire bends. Further, the discharge wire 34 that has been stretched for a long time bites into the groove of the pulley 17 and leaves a groove mark. In particular, the trace of the U-shaped bent through the pulley 17 stays in that portion and hardens, making it impossible to maintain the original stretched state. As a result, the discharge wire bent due to deterioration over time may come into contact with the anti-scattering roller due to mechanical vibration, resulting in wear and short-circuiting (leakage).
Such discharge wires 26, especially 34, deteriorate most frequently in the configuration of the device, and replacement work of the

stretched discharge wires

26 and 34 has occurred frequently (for example, once every six months).
Here, a method for exchanging the discharge wire 34 attached to the conventional anti-scattering roller 32 will be described. i. The sprinkling unit 20 comprising the powder storage tank 22, the sprinkling roller 24 and the discharge wire 26 is lifted and removed from the apparatus frame 12 (see FIG. 7(2)). Specifically, the mounting guide 28 of the spraying unit 20 is pulled out from the mounting hole 38 of the device mount 12 . ii. Loosen and remove the fixing screw that fixes the discharge wire 34 to the device mount 12 . iii. A new discharge wire 34 is attached and fixed in a taut state (see FIG. 8). iv. The spraying unit 20 is attached to the device mount 12 (see FIG. 7(1)). v. The spreading roller 24 is aligned.

(2) To replace the

discharge wires

26 and 34, the spraying unit 20 fitted on the upper surface of the device mount 12 must be lifted and removed. At this time, the spraying unit 20 was heavy (several tens of kilograms) and could only be removed by a plurality of people.
(3) Wiring such as the discharge wire 34 and a sensor for detecting the stretched state of the discharge wire 34 are arranged around the mounting location (around the mounting hole) when the removed spraying unit 20 is mounted. You have to be careful not to pinch it and break the wire.

Japanese Patent No. 3773191

SUMMARY OF THE INVENTION The problem to be solved by the present invention is, in view of the above-described problems of the prior art, to provide a powder spraying device in which the discharge wire can be easily replaced.
Another problem to be solved by the present invention is to provide a powder spraying device capable of prolonging the service life of the discharge wire, extending the replacement frequency, and stably spraying the powder by stable discharge. .

As a first means for solving the above problems, the present invention provides a sprinkling unit having a powder storage tank, a sprinkling roller, and a discharge wire, and an electric discharger disposed directly below the sprinkling unit on the downstream side and the upstream side between the rollers. to form a closed space for spraying, and two anti-scattering rollers arranged with a gap from the object to be sprayed and forcibly rotated, and a device mount, and the object to be sprayed passing below the anti-scattering roller In a powder spraying device that sprays powder to
A discharge wire is attached to each of the two anti-scattering rollers, and the spraying unit and the downstream and upstream anti-scattering units composed of the anti-scattering roller and the discharge wire are in an operating position close to each other and separated from each other. It is another object of the present invention to provide a powder spraying device capable of moving to a maintenance position where the discharge wire is replaced, and a space for exchanging the discharge wire is provided at the maintenance position.
According to the first means, the work of exchanging the discharge wire is facilitated. In addition, compared to the conventional long discharge wire, one short discharge wire is arranged on one anti-scattering roller. , it is possible to stably disperse powder by stable discharge. Furthermore, if the discharge wires of the spreading roller and the anti-scattering roller are of the same length, customer consumable parts management is facilitated.

As a second means for solving the above problems, the present invention provides a powder powder according to the first means, wherein the scattering prevention unit is provided with a unit mount that moves horizontally on the apparatus mount. To provide a body spreading device.
According to the second means, the discharge wire can be replaced without removing the heavy spraying unit, which facilitates the work. There is no movement of the spraying unit during replacement work, and there is no risk of disconnection of the discharge line 34 or wiring of various sensors.

As a third means for solving the above problems, the present invention provides, in the first or second means, an operating position in which the scattering unit is adjacent to the scattering prevention roller, and a maintenance unit in which the spreading unit is moved upward from the operating position. An object of the present invention is to provide a powder spraying device characterized by comprising a lifting means for moving in the vertical direction.
According to the third means, the replacement space can be provided by moving the heavy spraying unit without removing it from the apparatus, thereby facilitating the replacement work of the discharge wire.
In addition, unlike the conventional structure, the discharge wire is not damaged due to insufficient alignment of the installation guide of the spraying unit with the installation hole of the equipment frame, and the wiring of various sensors is pinched and broken. This eliminates the risk of damage to electric wires and disconnection of wires for various sensors.
Furthermore, if the spraying roller and the anti-scattering roller are aligned at the time of initial setting, even if the spraying unit is moved up and down by the lifting means during maintenance or discharge wire replacement work, the position at the time of initial setting can be restored when the unit is returned to the operating position. Since the position is maintained, there is no need for realignment, and the discharge wire can be replaced in a short period of time.

According to the present invention, as a fourth means for solving the above problems, in any one of the first to third means, the discharge wire of the anti-scattering roller is attached in a straight line or bent at an obtuse angle by a pulley. The object of the present invention is to provide a powder spraying device characterized in that it is attached to the
According to the fourth means, in the case of the linear shape, the installation space can be saved without using a pulley. In the case of an obtuse angle, the contact area with the pulley groove is smaller than that of the conventional U-shaped discharge wire, so that the amount of biting into the pulley can be reduced, and the stretched state of the discharge wire can be extended. In addition, the installation space can be saved more than the conventional 90-degree bending.

The present invention provides, as a fifth means for solving the above problems, a sprinkling unit having a powder storage tank, a sprinkling roller, and a discharge wire, and an air outlet disposed between the rollers on the downstream side and upstream side immediately below the sprinkling unit. to form a closed space for spraying, and two anti-scattering rollers arranged with a gap from the object to be sprayed and forcibly rotated, and a device mount, and the object to be sprayed passing below the anti-scattering roller In a powder spraying device that sprays powder to
Provided is a powder spraying device, wherein each of the two scattering prevention rollers is provided with a discharge wire, and the discharge wires of the scattering roller and the scattering prevention roller are set to have substantially the same length as each roller. to do.
According to the fifth means, the use life of the discharge wire can be extended by arranging one short discharge wire on one anti-scattering roller as compared with the conventional one long discharge wire. By extending the replacement frequency, it is possible to stably spray powder by stable discharge. Furthermore, if the discharge wire of the anti-scattering roller has the same length as the discharge wire of the spreading roller, it becomes easier for the customer to manage consumable parts.

According to the present invention, the discharge wire can be replaced without removing the heavy spraying unit from the device mount.
In addition, compared to the conventional long discharge wire, one short discharge wire is arranged on one anti-scattering roller. , it is possible to stably disperse powder by stable discharge. Furthermore, if the discharge wire of the anti-scattering roller has the same length as the discharge wire of the spreading roller, it becomes easier for the customer to manage consumable parts.

FIG. 2 is a side view and a plan view of the operating position of the powder spraying device of Example 1; 2 is a front view of the operating position of the powder spraying device of Example 1. FIG. FIG. 4A is a side view and a plan view of the maintenance position of the powder spraying device of Example 1. FIG. FIG. 10 is a plan view of the powder spraying device of Example 2; 8A and 8B are a side view and a front view of the operating position of the powder spraying device of Example 2. FIG. FIG. 10 is a side view and a front view of the maintenance position of the powder spraying device of Example 2; It is an explanatory view of a conventional powder spraying device. It is explanatory drawing of the discharge wire attached to the conventional anti-scattering roller.

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a powder spraying device of the present invention will be described in detail below with reference to the drawings.
(Embodiment 1: Scattering prevention unit left and right split type)
FIG. 1 is a side view and a plan view of the operating position of the powder spraying device of Example 1. FIG. FIG. 2 is a front view of the operating position of the powder spraying device of Example 1. FIG. FIG. 3 is a side view and a plan view of the maintenance position of the powder spraying device of Example 1. FIG.

As shown in the figure, the powder spraying device 10 of the first embodiment includes a powder storage tank 22, a spraying roller 24, and a spraying unit 20 having a discharge wire 26. Forming a spraying closed space 13 between the rollers, two anti-scattering rollers 32 arranged with a gap from the object to be sprayed and forcibly rotated, and a device mount 12 are provided, and pass under the anti-scattering rollers 32. In the powder spraying device 10 for spraying the powder on the object to be sprayed, one discharge wire 34 is attached to each of the two scattering prevention rollers 32, and the spraying unit 20, the scattering prevention roller 32 and the discharge wire The anti-scattering unit 30 consisting of 34 can be moved to an operating position close to each other and a maintenance position separated from each other, and a replacement space for the

discharge wires

26 and 34 is provided at the maintenance position.
The anti-scattering unit 30 of the first embodiment moves horizontally from the device mount 12 . Specifically, the two anti-scattering rollers 32 and the discharge wire 34 arranged below the spraying unit 20 are divided on a vertical line passing through the axis of the spraying roller 24, in other words, at the center of the device mount 12. One unit (referred to as a scattering prevention unit 30 ) is formed by arranging one scattering prevention roller 32 and one discharge wire 34 on a unit mount 36 . One discharge wire 34 attached to one unit of the anti-scattering roller 32 has a fixing screw on one end of the anti-scattering roller 32 and a fastener, a coil spring, and a deterioration detection sensor 50 on the other end of the anti-scattering roller 32 . Both ends are bent outward using a pulley 17 in a direction crossing the longitudinal direction (in FIG. 3, one end is orthogonal and the other end is at an obtuse angle). When the discharge wire 34 is bent at an obtuse angle using the pulley 17, the contact area with the pulley groove is smaller than that of the conventional discharge wire bent in a U shape, and the amount of bite into the pulley can be reduced. In addition, the installation space can be saved more than the bending of 90 degrees. Two such anti-scattering units 30 are arranged symmetrically with the scattering unit 20 as the center. Note that the discharge wire 34 may be attached linearly without using a pulley.
The device pedestal 12 is provided with a mount 14 on which the unit pedestal 36 can move horizontally. The mounting base 14 is provided with fixing holes 16 at both ends in the longitudinal direction into which fixing bolts 39 are fitted for fixing the anti-scattering unit 30 at the operating position when the unit is moved to the operating position.
The discharge wires 26 and 34 (spreading roller 24 and scattering prevention roller 32) of the present embodiment are provided with a discharge wire deterioration detection sensor 50 for detecting a state in which the

discharge wires

26 and 34 are deteriorated and stretched.

A method of exchanging the discharge wire in the powder spraying device of Example 1 having the above configuration will be described below. (i) When the discharge wire deterioration detection sensor 50 detects the deterioration of the

discharge wires

26, 34, the deterioration of the discharge wire 34 of the anti-scattering unit 30, or the deterioration of the discharge wire 26 of the spreading roller 24, the left and right one of the anti-scattering units 30 is moved from the operating position of the apparatus stand 12 to the maintenance position. (ii) Loosen the fixing screws of the

discharge wires

26 and 34 and remove them. (iii) Attach

new discharge wires

26 and 34 and fix them in a stretched state. (iv) Attach the anti-scattering unit 30 to the device mount 12 . (v) Positioning of the anti-scattering roller 32 is performed.

According to the powder spraying apparatus of the first embodiment, the discharge wire 34 is arranged for each anti-scattering roller 32, that is, two short wires. Therefore, the length of the discharge wire is shortened, and the amount of elongation due to deterioration over time is reduced (the permissible amount of elongation in the mounting groove where the fastener at one end of the discharge wire is fitted is doubled compared to the conventional one). The period can be extended, and stable discharge can be achieved for stable spraying. The structure of the short discharge wire facilitates the replacement work and shortens the work time.
In addition, the two anti-scattering rollers 32 are divided into two to form a anti-scattering unit 30 consisting of one anti-scattering roller 32 and one discharge wire 34. Since it is slid (horizontally moved), it can be replaced without removing the heavy spreading unit 20, which facilitates the work. The sprinkling unit 20 does not move during the replacement work, and there is no risk of disconnection of the discharge line 34 or wiring of various sensors. Furthermore, if the discharge wire 34 has the same length as the discharge wire 26 of the spreading roller 24, customer consumable parts management is facilitated.
In this embodiment, the anti-scattering unit 30 of the first embodiment has been described as being manually slidably moved from the mount 14 in the horizontal direction. An automatic method using a hydraulic drive cylinder may be employed. In this case, if the positions of the spraying roller and the anti-scattering roller are aligned at the time of initial setting, even if the anti-scattering unit is moved horizontally during maintenance or replacement work of the discharge wire, it will not return to the initial setting position when it is returned to the operating position. is maintained, there is no need for realignment, and the discharge wire replacement work can be performed in a short time.

(Embodiment 2: Sprinkling unit vertical movement type)
FIG. 4 is a plan view of the powder spraying device of Example 2. FIG. FIG. 5 is a side view and a front view of the operating position of the powder spraying device of Example 2. FIG. FIG. 6 is a side view and a front view of the maintenance position of the powder spraying device of Example 2. FIG.
As shown in the figure, the powder spraying apparatus 10A of the second embodiment includes a powder storage tank 22, a spray roller 24, and a discharge wire 26 on the downstream side of the powder spraying unit 20A. and two scattering prevention rollers 32 arranged on the upstream side to form a closed spraying space 13 between the rollers, arranged with a gap from the object to be sprayed and forcibly rotated, and a device mount 12, In a powder spraying device 10A that sprays powder onto a spraying object passing under the anti-roller 32, a discharge wire 34 is attached to each of the two anti-scattering rollers 32, and the sprinkling unit 20A is composed of one anti-scattering roller 32. The downstream and upstream anti-scattering units comprising the prevention roller 32 and one discharge wire 34 can be vertically moved to an operating position close to each other and a maintenance position separated from each other, and the

discharge wires

26 and 34 are replaced at the maintenance position. have space.

In the powder spraying device 10A of the second embodiment, the scattering prevention units consisting of one scattering prevention roller 32 and one discharge wire 34 are two units on the downstream side and the upstream side. Do not separate. The sprinkling unit 20A moves vertically between an operating position near the scattering prevention roller 32 and a maintenance position moved upward from the operating position. The specific configuration includes unit support members 40 extending outward from both ends along the longitudinal direction of the sprinkling unit 20A, and drive cylinders 42 (electric cylinders, fluid (air, air, A lifting means is provided having hydraulically actuated cylinders, etc.). A guide rod 44 of the drive cylinder 42 is vertically movable from the top surface of the cylinder toward the unit support member 40 , and the tip of the guide rod 44 is joined to the bottom surface of the unit support member 40 .
The powder spraying apparatus according to the second embodiment has a configuration in which both longitudinal ends of the spraying unit 20A are supported by the drive cylinders 42 and move vertically (elevate) between the operating position and the maintenance position.
Since the anti-scattering unit of the second embodiment has a non-separable structure as in the first embodiment, the configuration for attaching the discharge wire 34, for example, the fastener at one end and the coil spring may be shared. This can reduce the number of parts.

A method of replacing the discharge wire in the powder spraying device of Embodiment 2 having the above configuration will be described below. (i) When deterioration of the

discharge wires

26, 34 is detected by the discharge wire deterioration detection sensor 50, the sprinkling unit 20A is moved from the operating position to the maintenance position above to provide a replacement space for the

discharge wires

26, 34. (ii) Loosen the fixing screws of the deteriorated

discharge wires

26 and 34 and remove them. (iii) Attach

new discharge wires

26 and 34 and fix them in a stretched state. (iv) move the spraying unit 20A to the operating position;

According to the powder spraying apparatus of the second embodiment, the discharge wire can be replaced by opening the spraying unit 20A and the scattering prevention roller 32 only by moving the spraying unit 20A upward without removing it from the apparatus frame 12. A space can be provided, and replacement work becomes easy.
In addition, unlike the conventional configuration, the positioning of the mounting guide of the spraying unit into the mounting hole of the equipment frame is insufficient, which may damage the discharge wire, or the wiring of various sensors may be pinched and broken. This eliminates the risk of damage to electric wires and disconnection of wires for various sensors.
Furthermore, if the spraying roller and the anti-scattering roller are aligned at the time of initial setting, even if the spraying unit is moved up and down by the lifting means during maintenance or discharge wire replacement work, the position at the time of initial setting can be restored when the unit is returned to the operating position. Since the position is maintained, there is no need for realignment, and the discharge wire can be replaced in a short period of time. As a result, it is possible to prolong the replacement period of the discharge wire 34 as in the first embodiment, and stable spraying by stable discharge becomes possible. Furthermore, if the discharge lines 26, 34 are made to be the same length, customer consumable parts management is facilitated.
The powder spraying device of the present invention may have a configuration in which the scattering prevention unit is divided horizontally and the spraying unit moves vertically. In this case, the anti-scattering unit or the spraying unit can be moved to the maintenance position in accordance with the discharge wire to be replaced, and the replacement work becomes extremely easy in a short time.

The discharge wire of the anti-scattering roller of the present invention may be attached straight or bent at an obtuse angle using a pulley. As a result, in the case of a straight line, a pulley is not used as in the case of the discharge line 26 (see the discharge line 26 in FIG. 1-6), so installation space can be saved. In the case of an obtuse angle, the contact area with the pulley groove is smaller than that of the conventional U-shaped discharge wire, and the amount of biting into the pulley can be reduced. . In addition, the installation space can be saved more than the bending of 90 degrees.
In the spreading roller and anti-scattering roller of the present invention, a discharge wire having a length substantially equal to the length of the roller is arranged for each roller. Therefore, it is possible to prolong the service life of the discharge wire, to prolong the replacement frequency, and to stably spray the powder by stable discharge. Furthermore, customer consumable parts management becomes easier.
Two or more anti-scattering rollers may be provided on the upstream and downstream sides of the present invention. Also in this case, a discharge wire is provided for each of the two or more anti-scattering rollers.

The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above-described embodiments, and various modifications are possible without departing from the gist of the present invention.
Moreover, the present invention is not limited to the combinations shown in the embodiments, and can be implemented in various combinations.

The present invention has industrial applicability, particularly in the field of powder spraying, in which powder is sprayed onto the surface of plastic films, rubber sheets, and the like.

10, 10A powder spraying device 12 device stand 13 spraying closed space 14 mounting base 16 fixing hole 17

pulleys

20, 20A spraying unit 22 powder storage tank 24 spraying roller 26 discharge wire 28 mounting guide 30 scattering prevention unit 32 scattering prevention roller 34 Discharge wire 36 Unit mount 38 Mounting hole 39 Fixing bolt 40 Unit support member 42 Drive cylinder 44 Guide rod 50 Discharge wire deterioration detection sensor

Claims

A spraying unit having a powder storage tank, a spraying roller, and a discharge wire, and a spraying unit disposed directly below the spraying unit on the downstream side and the upstream side to form a spraying closed space between the rollers, and have a gap between the sprayed object and the spraying object. A powder spraying device that includes two scattering prevention rollers arranged and forcibly rotated and a device stand, and that sprays powder onto the object to be sprayed that passes under the scattering prevention rollers,
A discharge wire is attached to each of the two anti-scattering rollers, and the spraying unit and the downstream and upstream anti-scattering units composed of the anti-scattering roller and the discharge wire are in an operating position close to each other and separated from each other. and a space for exchanging the discharge wire is provided at the maintenance position.
In the powder spraying device according to claim 1,
The powder spraying device, wherein the scattering prevention unit includes a unit mount that moves horizontally on the device mount.
In the powder spraying device according to claim 1 or 2,
A powder spraying apparatus, wherein the spraying unit is provided with an operating position in proximity to the scattering prevention roller, and an elevating means for moving up and down between a maintenance position moved upward from the operating position.
In the powder spraying device according to any one of claims 1 to 3,
A powder spraying device, wherein the discharge wire of the scattering prevention roller is attached in a straight line or is attached by being bent at an obtuse angle by a pulley.
A spraying unit having a powder storage tank, a spraying roller, and a discharge wire, and a spraying unit disposed directly below the spraying unit on the downstream side and the upstream side to form a spraying closed space between the rollers, and have a gap between the sprayed object and the spraying object. A powder spraying device that includes two scattering prevention rollers arranged and forcibly rotated and a device stand, and that sprays powder onto the object to be sprayed that passes under the scattering prevention rollers,
A powder spraying device, wherein each of said two scattering prevention rollers is provided with a discharge wire, and the discharge wires of said scattering roller and said scattering prevention roller are set to have substantially the same length as each roller.