JPS59209768A - Sand blast nozzle - Google Patents

Abstract

PURPOSE:To make it possible to form an optimum pattern of blast air stream jetted from a sand blast nozzle, coforming to the surface to be worked of an object, by enabling the pattern of air-stream to be enlarged or swirled. CONSTITUTION:A nozzle holder 1 is fitted, on its blast air stream inlet side, therein with a large diameter nozzle pipe 2 made of hard materials, and is formed therein with a reservoir chamber 3 between the front of the nozzle pipe 2 and the front wall of the nozzle holder. Small diameter nozzles 5 are fitted, respectively in rectilinear holes 6 formed piercing through the front wall 4, and are retained by screws 7 tightened into the nozzle holder 1. Further, a retainer plate 8 is abutted against the opening of the nozzle holder 1, and is secured to the end face of the nozzle holder 1 by means of screws 9 to retain the front wall 4 and the small diameter nozzles 5 for preventing them from coming off. Blast air stream is jetted from the nozzle pipe 2 and filled in the reservoir chamber 3 so that the condition of high-pressure air is established in the chamber 3. The blast air stream is uniformly distributed to the three small diameter nozzles 5, and therefore, is jeted from the front end of the nozzle holder 1 as three thin blast air stream beams.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvements in sandblasting nozzles.

In conventional sandblasting nozzles, a large diameter nozzle made of hard metal or ceramic is fitted into a nozzle holter, an air hose is connected to the nozzle holder, and a blast air stream containing abrasive material is ejected forward from the nozzle.

The blasting airflow forms a single straight jet toward the object placed in front of the nozzle, and adds blasting force to the object. To blast a large area, the nozzle must be moved back and forth many times to apply the blast air stream to the surface of the object.

In addition, in order to blast the inner surface of the tube or the recessed space of the object, a special device was required to rotate the nozzle around the tube axis with the nozzle tip facing the inner surface of the 7Ft.

The present invention discloses a blasting nozzle that is capable of enlarging or swirling the pattern of the blast airflow ejected from the blast nozzle. +)i on the outflow side
jx:'tM made of hard paulownia wood on s714+
Small number i: Y: Attach the nozzle (5) and connect each small diameter nozzle (
5) is a sandblast whose base end is opened into the reservoir chamber (3) and the tip is wide open in front of the nozzle hole.

In the present invention, by changing the direction of the small-diameter nozzle attached to the front wall of the nozzle holder, the pattern of the ejected blast airflow can be freely changed, and the optimum airflow pattern can be formed according to the processing surface of the object.

If the tip of the small-diameter nozzle is installed with the tip facing outward as shown in Figure 2, the pattern of the blast airflow will be ejected outward and the area that will impact the surface of the object will be expanded, so it is difficult to attach the nozzle for blasting. The number of reciprocating operations toward the object surface is reduced.

In addition, by installing the small diameter nozzle with the tip facing the tangential direction of the nozzle holder, the blast airflow ejected from the 11T of the small diameter nozzle (5) becomes a spiral flow in the pipe, expands, and is ejected from the door. , blasting treatment can be applied to the inner surface of the tube.

Figure 1 shows an embodiment of the present invention, in which a nozzle holder (1) has a large-diameter nozzle button (2) formed of a hard phase on the inlet side of the blast airflow. , a reservoir chamber (3) with an enlarged inner diameter is provided between the front of the nozzle pipe (2) and the front wall.
) is formed.

Three straight holes (6) are made in the front wall (4) at equal intervals and parallel to the nozzle axis, and the small diameter nozzles (5) shown in Fig. 3 are fitted into the three straight holes (6), respectively. , nozzle holder (1)
At the same time, place the press plate (8) on the opening of the nozzle holder (1) and fix it to the end face of the nozzle holder (1) with the screw (9).
The wall (4) and each small diameter nozzle (5) are held down to prevent removal.

The blast airflow that has entered the inlet side of the nozzle is ejected from the nozzle pipe (2) and fills the chamber (3), forming a high-pressure air condition. Since the base ends of the three small-diameter nozzles (5) are open in the reservoir chamber (3), the blast air flow flows through each of the three small-diameter nozzles (5).
), and it flows out into three narrow blast airflows east of the tip.

Install the small-diameter nozzle (5) to be attached to the front wall (4) with the tip facing outward in the radial direction at an angle of I]1<1' in Fig. 4, and insert it into the nozzle holder (1). If it is fixed, the nozzle will produce three thin blast airflows that spread in three directions in a 9 (11) pattern, making it possible to impact a wide area of the object's surface for efficient blasting.

In addition, in the embodiment shown in FIG. 1 or 4, a small diameter nozzle (5
) by horizontally recessing it in the tangential direction of the nozzle holder (1), it is possible to make the thin three-wood blast air stream ejected from the three-wood small-diameter nozzle (5) in a tangential direction. If this blast airflow is ejected into the pipe or at the recess of the object, the blasting airflow will eject along the inner surface of the object with a 4, 1, 11 rotation, and the blasting process will be performed. Alternatively, the side wall of the recess of the object can be blasted.

Note that the number of small diameter nozzles can be any number (for example, 2).

I was able to decide on the 10th one, and that was it! f, (14
The direction of f·1'' in ) is set to 11) appropriately according to the surface of the object to be processed, and a desired frustrated airflow pattern can be formed.

It should be noted that the present invention is not limited to the configuration described above, and it goes without saying that numerous modifications can be made within the technical scope of the claims.

[Brief Description of the Drawings] Fig. 1 is a longitudinal sectional view of a sandblasting nozzle according to the present invention, Fig. 2 is a sectional view taken along lines u and L u in Fig. 1, and Fig. 3 is a sectional view taken along lines u and L u in Fig.
The figure is a longitudinal cross-sectional view of a small-diameter nozzle, and FIG. 4 is a cross-sectional view of a nozzle tip in another embodiment. □■...Nozzle holder (2)...Nozzle pipe (3)...) Retention chamber (4)...:)iJ Wall (5)...
・Small diameter nozzle Fig. 2 Fig. 8

Claims (1)

[Claims] ■ A reservoir 7 is provided on the blast air flow inflow side of the nozzle holder (1).
A storage chamber (3) is formed, and a holder t is attached to the storage chamber (3).
j,) A plurality of small-diameter nozzles (5) formed of a hard material can be seen on the front wall (4) on the outflow side, and each small-diameter nozzle (5)
) The sandblasting nozzle is characterized in that the base end of the nozzle (5) is connected to the reservoir chamber (3), and the tip thereof is connected to the front of the nozzle hole (1). The sandblasting nozzle of the scope No. 1 of Patent No. 111, which is attached radially outward with Jl'7. ■ Each small diameter nozzle (5) has its tip attached to the nozzle holter (
1). A special feature that is installed horizontally in the tangential direction of the fl.17. +'f claim. Sandblasting nozzle according to item 1 or 2.