JPH0541138U - Air knife - Google Patents

Abstract

(57) [Abstract] [Purpose] Air used as a draining means for the circuit board after washing with water in a chemical treatment device for printed circuit boards.
With the knife, air is supplied to the entire air supply side and tip side.
(EN) An air-knife capable of uniformly removing water droplets from the surface of a printed circuit board by solving the problem that water droplets remain on the surface of the printed circuit board at a position close to the air supply side by balancing the blowout of the air. A nozzle portion 1 for ejecting air in a long and thin manner is provided on one side in the longitudinal direction of a body portion 2 for feeding air, and the inside of the body portion 2 is of a size that does not close the inside of the body. The rod 5 provided with the cone 4 of the
A structure in which the cone 4 is adjustably arranged at any position in the body portion 2 in the axial direction via the.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an air knife for use as a water draining means for a circuit board after being rinsed with water in a chemical solution treatment apparatus for a printed circuit board.

[0002]

[Prior art and its problems]

 There are various chemical treatment processes in the manufacturing process of printed circuit boards, and circuit boards treated with such chemical treatment often need to be washed once with water before moving to the next process. Then, an appropriate draining treatment is applied to the circuit board that has been subjected to the water washing treatment, but as a means for draining water, a method of spraying air on the surface of the circuit board may be simple.

Therefore, for such a water draining means, for example, an air knife having a nozzle for ejecting air to one side in the longitudinal direction of a pipe-shaped member having a length corresponding to the width of a circuit board is provided. Combined with the simple structure, it is suitable as this type of draining means.

In such an air-knife, when observing the air-blowing with respect to the entire nozzle width, the air-blowing tends to be weak on the air supply side and strong on the opposite tip side, and , The water droplets are not uniformly removed due to the deviation of the fixed angle of the nozzle or the progress of the clogging of the filter provided on the air supply source, and the water droplets remain on the surface of the printed circuit board located near the air supply side. The problem occurs.

[0005]

[Purpose and structure of device]

 The present invention is an air knife suitable as a water draining means for a circuit board after being washed with water in a chemical solution treatment apparatus for a printed circuit board. Providing an air-knife that can remove water droplets uniformly from the printed circuit board surface while solving the problem of water droplets remaining on the printed circuit board surface near the air supply side by balancing. To do.

Therefore, in the air knife according to the present invention, a nozzle portion for ejecting air in a long and thin manner is provided on one side in the longitudinal direction of the body portion for feeding air, and the inside of the body portion is provided. The body is provided with a cone having a size that does not close the inside of the body, and the cone is attached to the body through a rod installed on the tip side opposite to the air supply side of the body. It is characterized in that it can be arranged at the position of.

[0007]

【Example】

 Hereinafter, the present invention will be further described with reference to one embodiment shown in the drawings. FIG. 1 is a partially cutaway schematic view of an air-knife according to the present invention, and FIG. 2 is an enlarged sectional view taken along line XX of FIG. Indicates. In both figures, reference numeral 2 denotes a body portion for air feeding which can be constituted by a hollow member such as a vinyl chloride pipe, and an elongated notch groove for blowing air on one side in the longitudinal direction thereof. A wide nozzle portion 1 having an elongated outlet for blowing air with a predetermined width on the surface of the printed circuit board in conformity with the position where the notch groove is formed is airtightly attached.

Inside the body portion 2, a cone 4 formed smaller than the inner diameter thereof is arranged so that its tip end faces the air supply side of the body portion 2, and the rod 5 has a rod 5 at the bottom thereof. While attaching one end, the other end of the rod 5 is projected to the outside through a hole 3 of a fixture provided on the tip side of the body portion 2, and the rod 5 allows the cone 4 to be arbitrarily set in the axial direction of the body portion 2. It is configured so that the cone 4 can be fixed and maintained at a required position by moving to the position and fixing the rod 5 using the set screw 6.

According to the air knife having the above structure, in the case of FIG. 1, air is fed from the air feed side at the left end to the inside of the body portion 2 by the air feed source such as a blower. By moving the cone 4 to an arbitrary position in the axial direction of the body 2 via the cone 4 and fixing the cone 4 at a position where the air blowing strength is balanced from the air supply side to the tip side. Since the strength of the air blown from the nozzle portion 1 in the width direction can be adjusted uniformly, the water droplets can be uniformly removed without leaving the water droplets partially on the printed circuit board surface.

[0010]

[Effect of the device]

 According to the air knife of the present invention, by adjusting the position of the cone from the outside of the body portion of the air knife, the air from the air supply side of the air knife to the tip side is adjusted even when the air supply source is in operation. -Because it is possible to reliably balance the blowout strength of-, the problem of leaving water droplets on the printed circuit board surface corresponding to the position close to the air supply side is preferably solved and water droplets are evenly distributed from the printed circuit board surface. It can be removed.

Therefore, the draining process accompanying the washing process for the printed circuit board after the chemical solution treatment can be efficiently performed by a simple method.

[Brief description of drawings]

FIG. 1 is a partial cutaway schematic view of an air knife according to an embodiment of the present invention.

2 is an enlarged cross-sectional view taken along line XX of FIG.

[Explanation of symbols]

 1 Nozzle part 2 Body part 3 Hole 4 Cone 5 Rod 6 Set screw

Claims (1)

[Scope of utility model registration request] 1. A nozzle portion for ejecting air in a long and thin manner is provided on one side in the longitudinal direction of a body portion for feeding air, and the inside of the body portion does not close the inside of the body. The cone is formed so that the cone can be arranged at any position in the axial direction of the body via a rod installed on the tip side opposite to the air supply side of the body. An air-knife characterized in that.