JP2704436B2 - How to spray powder on film - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a film which easily adheres to each other, for example, a film such as a vinyl film used for a greenhouse, in order to prevent the film from adhering to each other and to facilitate handling. The present invention relates to a method for efficiently spraying powder such as starch and corn powder on the surface.

(Prior art) Conventionally, powder is sprinkled on the surface of a film, or powder is sprinkled by a fan for exclusive use of powder sprinkling, or an appropriate amount of powder is continuously inserted into the suction side of the fan and blown through the air blower. There has been a method in which air is blown into a pipe and sprayed from a spray port appropriately disposed on the blower pipe to spray.

(Problems to be Solved by the Invention) Apart from the conventional methods of direct sprinkling and spraying only by a blower, the powder is conveyed into a blower tube by a blower and arranged at a predetermined position of the blower tube. The method of spraying from the powder injection port has a feature that it can be spread over a wide range, but the amount of powder to be sprayed from the powder injection port cannot be adjusted.

Further, at the end of the blower tube 1, there is a drawback that the amount of wind and powder ejected gradually decreases due to a drop in wind pressure, and the amount of powder injected from a powder injection port near the inlet of the blower tube and the amount of powder in the blower tube are reduced. Since the amount of powder is different from that of the powder injected from the powder injection port near the outlet, the conventional powder spraying apparatus responds by changing the diameter of the injection port or changing the dimension of the arrangement interval. In addition, when the humidity in the atmosphere increases, there is a problem that the amount of powder ejected from the wet injection port becomes extremely poor, but no countermeasure has been taken at the powder spraying site.

SUMMARY OF THE INVENTION An object of the present invention is to provide a method of spraying powder on a film to solve the above problems.

(Means for Solving the Problem) In a device in which powder is sprayed on the surface of a film by a powder ejecting device provided in an air sending tube for conveying powder by wind, the powder ejecting device protrudes into the air sending tube and has A powder collecting gutter is provided to collect (take in) the powder conveyed in the wind, and the powder collected by the powder collecting gutter is rotated or moved in and out to communicate with the inside of the powder collecting gutter. The amount of injection from the mouth is controlled.

(Operation) The powder conveyed by the wind in the air duct is taken in by a powder collecting gutter and guided to an injection port. The powder is sprayed from the injection port to adhere the powder to a film, and the powder collection gutter is rotated. By changing the area (powder intake area) of the powder collecting gutter that is exposed to the wind due to the inflow and out, the amount of powder that the powder collecting gutter takes in is changed, and the size of the injection port is changed to eject the powder from the injection port. Is controlled.

Embodiment An embodiment of the present invention will be described with reference to the drawings. FIG. 5 and FIG. 6 show a conventional powder spraying state in which powder is sprayed on the film surface. FIG. 5 shows a method of spraying the powder when the film is flown vertically, and FIG. 6 shows a method of spraying the powder on the film when the film is flown horizontally.

In both figures, the film 7 (for example, having a thickness of 0.05 to 0.1 mm and a width of 2 m to 6 m or more) on which the powder 8 is adhered is unwound directly from the rolled raw material 20 or via the roller 9 and the driving device. . On both sides of the surface of the film 7 to be unwound (unwound), a predetermined dimension, for example, 10 to
A powder injection port, for example, a blower tube 1 for transferring powder having a desired number of 6 mm in diameter, for example, 6 cm in diameter, is provided 30 cm away from the film surface, and one end of one blower tube 1 is a blower 4 and The powder is circulated by being connected to the powder supply device 5, then to the other air supply pipe 1, and from the end of the other air supply pipe 1 to the inlet of the one air supply pipe 1. .

The powder blown through the blower 4 adheres to the surface of the film sprayed from the injection port provided in the blower tube 1.

(Embodiment 1) Embodiment 1 of the present invention will be described with reference to FIGS. 1, 2, and 3. FIG. After cutting, the powder injection device 2 is screwed to the screw of the injection port.

The powder injection device 2 includes a main body 12 that is detachably attached to the wind pipe 1 and that can be screwed and fixed in a free direction. The main body 12 of the powder injection apparatus has an injection port 13, and the inside of the main body 12 includes A powder collecting gutter 17 for taking in the powder conveyed by the wind is rotatably inserted and mounted in a cylindrical hole 21, and a locking piece provided at the tip of the powder collecting gutter 17 penetrating to the outside coaxially with the cylindrical tube 21. A through hole 22 for mounting 14 was formed.

The powder collecting gutter 17 has a semi-cylindrical shape that fits into the cylindrical hole 21 of the main body 12 of the powder injection device and is rotatable in the direction of arrow 18, and has a diameter of about 6 mm at one end of the semi-cylindrical shape. There is a base 23 on a disk, and a cylindrical locking piece 14 coaxial with the base 23 is provided on one surface of the base 23. The powder collecting gutter 17 is inserted into the cylindrical hole 21 of the main body 12 with the locking piece 14 first from the inside of the ventilation pipe 1, and the locking pin 16 is inserted into the pin hole 15 provided in the locking piece 14.
Then, the locking piece 14 is pinned to the main body 12, and the powder collecting gutter 17 is attached to the main body 12.

The gutter portion 24 of the powder collecting gutter 17 protrudes from the screw portion of the main body by a predetermined dimension, and the pin 16 is used as a handle with respect to the main body, and the powder collecting gutter 17 is provided.
17 can be rotated in the direction of arrow 18. Therefore, the third
As shown in the figure, the injection port 13 forms an operating state such as fully open, half open, or fully closed depending on the rotational position of the powder collecting gutter 17.

In FIG. 3, FIG. A is a substantially central sectional view of the main body 21 in which the powder collecting gutter 17 is not inserted, and the main body cylindrical hole 21 and the injection port 13 communicate with each other. Fig. B shows a state in which the powder collecting gutter 17 is inserted into the cylindrical hole 21 of the main body, and the injection port 13 is fully opened with the open surface of the powder collection gutter 17 facing the injection port 13 side.
The inside 19 of the powder pipe, that is, the inside of the air pipe 1 and the injection port 13 are completely communicated, and the maximum amount of powder conveyed on the wind in the direction of arrow 25 is received in the inside 19 of the powder collection gutter 17 and the injection port 13 is received. Spray more. Fig. C shows that the powder collecting gutter 17 in the main body is set to an appropriate amount, for example, 45 g.
Due to this rotation, the collection amount of the powder conveyed on the wind is also substantially reduced by half, and the inside 19 of the powder collection gutter 17 and the injection port 13 are in a half-open state. The powder injection amount can be freely controlled by the rotation angle of the powder collection gutter 17.

Figure D shows that the powder collecting gutter 17 is turned approximately 180 degrees in reverse,
The injection port 13 is closed by the back 24 of the powder collection gutter 17 (the part that functions as a valve for adjusting the opening and closing of the injection port), and the injection of the powder is stopped.

In this way, the powder collecting gutter 17 can be turned from the outside of the wind pipe 1 to control the amount of powder injected as required.

Also, in the pipe being blown, a powder collecting gutter 17 for collecting powder in a state that resists the wind is projected,
The powder can be easily taken in from the blower pipe 1 so that the powder is injected from the injection port 13, and the powder injection amount is controlled by rotating the powder collecting gutter 17 at an appropriate angle.

If the tip of the powder collecting trough 17 is closed 26 as shown in FIG. 2.B, the powder collecting efficiency is improved.

(Example 2) As in Example 1, instead of controlling the amount of powder injection by projecting and turning the powder collection gutter 17 into the air supply pipe, the powder collection gutter 17 is moved in and out of the air supply pipe. Powder collection gutter
The 17 powder collection areas are adjusted to control the amount of powder to be collected. The tip of the powder collecting trough 17 is preferably closed as shown in FIG. 2.B.

(Embodiment 3) As shown in FIG. 4, the operation of rotating or entering and exiting the powder collecting gutter 17 is performed by the connecting rod 27 that passes through the inside of the air pipe 1 instead of the side of the injection port 13. It can be operated outside of the pipe 1.

Powder injection device 2 screwed to a predetermined position of wind pipe 1
A rod connecting portion of an appropriate structure, for example, a screw connecting portion 30 is formed at the inner end of the air supply pipe of the powder collecting gutter 17 provided inside, and a connecting rod 27 coaxial with the powder collecting gutter 17 is screwed into the screw connecting portion 30. It is fixed. Powder injection device 2 on the center line of powder collecting gutter 17
Air-tight bearings 29 of appropriate structure
The connecting rod 27 penetrates the central part. A rotary knob 28 is fixed to the end of the penetrating connecting rod 27, and the powder collecting gutter 17 rotates in conjunction with the rotation of the rotary knob 28. By such an operation, the injection amount of the powder ejected from the ejection port 13 is controlled.

(Embodiment 4) In the configuration of Embodiment 3 in which the operation of the powder collecting gutter 17 is performed on the side opposite to the side where the powder injection device 2 is mounted in the wind pipe 1,
Instead of controlling the injection amount of the powder by rotating the powder collecting gutter 17, the connecting rod 27 is moved in and out to move the powder collecting gutter 17 into and out of the air duct 1 to take in the powder collecting gutter 17. It controls the amount of powder and the amount of injection.

(Effects of the Invention) With the above configuration, the following effects are exhibited by rotating the powder collection gutter 17 by a predetermined angle in the air duct, or by moving the powder collection gutter 17 in and out.

A large amount of powder can be sprayed regardless of the humidity of the atmosphere.

 The powder injection amount can be freely controlled.

 The structure is simple and does not break down.

 Control is simple and reliable.

 The powder adheres evenly to the film surface.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing a portion where the powder injection device 2 is mounted in the powder air pipe 1. FIG. A is a plan central sectional view. B is a front view. C is a side view. FIG. 2 is a perspective view showing the structure of the injection device. FIG. A is a schematic explanatory view showing an assembling procedure. FIG. B is a partial view showing the tip of the gutter. FIG. 3 is a sectional view of an injection port of the injection device. A, B
Figures, C and D are explanatory diagrams showing the relationship between the injection port and the gutter. FIG. 4 is a schematic configuration diagram showing a portion where a powder injection device of another embodiment is mounted in a powder air pipe. A is a plan center sectional view. B is a front view. FIG. C is a side view. FIG. 5 is a perspective view showing a state in which powder is sprayed on the surface of the film moving in the vertical direction. A is a schematic plan view. B is a schematic front view. FIG. C is a schematic sectional view taken along a dashed line 31 in FIG. FIG. 6 is a perspective view showing a state where powder is sprayed on the surface of the film moving in the horizontal direction. DESCRIPTION OF SYMBOLS 1 ... Air blow pipe, 2 ... Powder injection device, 12 ... Body of powder injection device 13 ... Injection port, 17 ... Powder collection gutter

Claims (4)

(57) [Claims] 1. A powder injection device (2) disposed at a predetermined position of an air supply pipe (1) for conveying powder by the wind is communicated with an injection port (13) of the device (2). A powder collection gutter (17) having a substantially gutter shape is provided so as to protrude into the air supply pipe (1), and powder conveyed by wind in the air supply pipe (1) is supplied into the powder collection gutter (17). Into the powder collecting trough (1
7) A method of spraying powder on a film, characterized in that the powder is sprayed from a spray port (13) communicating with the inside. 2. The film according to claim 1, wherein the powder collecting gutter (17) can be rotated by an appropriate amount on the gutter center line to control the amount of powder collected to control the injection amount. How to spray. 3. A film according to claim 1, wherein the amount of powder collected is adjusted by moving a powder collecting gutter (17) into and out of the blower (1) from inside the injection device (2). How to spray powder on 4. The film according to claim 1, wherein the operation of rotating or entering and exiting the powder collecting gutter (17) is performed outside the injection port (13) via a connecting rod (27). How to spray powder.