Nozzle body of mixed liquid discharge device

Abstract

To prevent dripping from a nozzle body of a mixed liquid discharge device effectively after work of discharging a mixed liquid from the nozzle body ends.SOLUTION: A nozzle body 1 is included in a mixed liquid discharge device 2 which discharges a mixed liquid, formed by mixing a first liquid with a second liquid, to a workpiece 5 and includes: a cylindrical casing 6; and a slide shaft 7 which may slide in the casing. A tip of the casing is provided with a tip wall 12 which covers the tip of the casing. The tip wall 12 includes a discharge opening 3 for discharging the mixed liquid to the outer side. An inner surface of the tip wall 12 includes a contact surface which may contact with a tip portion of the slide shaft 7 in a fluid-tight manner to close the discharge opening.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a nozzle body provided in a mixed liquid discharge device that discharges a mixed liquid obtained by mixing a first liquid and a second liquid onto a workpiece. [Background technology]

[0002] As shown in Patent Document 1, a mixed liquid discharge device is already known for filling a workpiece with a relatively viscous mixed liquid such as an adhesive, paint, or semiconductor sealant obtained by mixing a first liquid and a second liquid. This mixed liquid discharge device is equipped with a nozzle body (51), and as shown in Fig. 6, a tip portion (52) of the elongated nozzle body (51) is provided facing vertically downward. The tip portion (52) of the nozzle body (51) is positioned facing the workpiece, and the mixed liquid is discharged from the tip of the nozzle body (51) onto the workpiece.

[0003] [Patent Document 1] Patent No. 4587881 DISCLOSURE OF THE INVENTION [Problem to be solved by the invention]

[0004] However, when such a nozzle body 51 having a narrow tip 52 is used, after the discharge of the mixed liquid onto the workpiece is completed, the mixed liquid remains at the tip 52 of the nozzle body 51. The mixed liquid remaining at the tip 52 of the nozzle body 51 is prone to dripping when the nozzle body 51 is moved for the next discharge or when the vacuum chamber is depressurized during the discharge operation inside the vacuum chamber.

[0005] Therefore, the present invention aims to solve the above-mentioned problems and to effectively prevent dripping from the nozzle body of a mixed liquid discharge device after the discharge of the mixed liquid from the nozzle body has been completed. [Means for solving the problem]

[0006] The present invention relates to a nozzle body provided in a mixed liquid discharge device that discharges a mixed liquid obtained by mixing a first liquid and a second liquid onto a workpiece, the nozzle body including a cylindrical casing. And, It is slidable within the casing. Rusuri Equipped with a moving shaft The sliding shaft has a recessed portion at the center of the tip, and an O-ring is provided on the outer periphery of the recessed portion. The tip of the casing is provided with a tip wall that covers the tip of the casing, and this tip wall is provided with a discharge opening for discharging the mixed liquid to the outside, and the sliding shaft is provided on the inner surface of the tip wall. On the outer periphery of the tip of The discharge opening is closed by a contact surface that contacts the discharge opening in a liquid-tight manner. and a protruding flange protruding outward is provided in the circumferential direction on the outer surface of the tip wall at the edge of the discharge opening. It is something.

[0007] child By providing a protruding flange as shown in FIG. 1, when the discharge of the mixed liquid is stopped, the mixed liquid adhering to the discharge opening does not remain due to its own surface tension. <Protruding The mixed liquid drips onto the workpiece through the flange, making it possible to more effectively prevent dripping of the mixed liquid.

[0008] In addition, the outer periphery of the sliding shaft may be provided with an outer periphery protrusion that can abut against the inner periphery of the casing, and the outer periphery protrusion may be provided with a communication recess that allows the mixed liquid to communicate with the inner periphery of the casing.

[0009] By providing the sliding shaft with the outer peripheral protrusions in this way, the sliding shaft slides inside the casing while the outer peripheral protrusions abut against the inner peripheral surface of the casing. Therefore, when the sliding shaft slides inside the casing, it is less likely that the sliding shaft will tilt in the radial direction and cause a wobble in its sliding. Therefore, the sliding shaft can slide smoothly in the axial direction inside the casing. [Effects of the Invention]

[0010] As described above, in the present invention, the inner surface of the tip wall is provided with an abutment surface that abuts in a liquid-tight manner against the tip portion of the sliding shaft to close the discharge opening, so that the discharge opening can be reliably closed by abutting the sliding shaft against the abutment surface after the mixed liquid has been discharged from the nozzle body.

[0011] Therefore, since no nozzle is formed outside the discharge opening as described above, the mixed liquid is less likely to remain outside the discharge opening when the discharge opening is closed, and therefore, even if the nozzle body is moved after the discharge of the mixed liquid is completed, it is possible to effectively prevent the mixed liquid from dripping from the discharge opening. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is a cross-sectional view showing a first embodiment of the present invention. [Figure 2] FIG. 1 is a conceptual diagram showing a mixing device of Example 1. [Figure 3] FIG. 2 is a partially enlarged cross-sectional view showing the tip of the nozzle body of FIG. [Figure 4] Cross-sectional view of line AA in Figure 3. [Figure 5] FIG. 4 is a partially enlarged cross-sectional view showing a non-contact state between the tip outer peripheral surface and the contact surface in the first embodiment. [Figure 6] FIG. 10 is an enlarged partial cross-sectional view showing a conventional nozzle body. Example 1

[0013] An embodiment of the present invention will be described below with reference to the drawings. First, as shown in Fig. 1, (1) is a nozzle body, which is fixedly disposed in a mixed liquid discharge device (2). As shown in Fig. 2, this nozzle body (1) has a discharge opening (3) disposed vertically downward, so that the mixed liquid transferred from a two-liquid mixer (4) that mixes a first liquid and a second liquid to the mixed liquid discharge device (2) can be discharged onto a workpiece (5) through the discharge opening (3).

[0014] As shown in Fig. 1, the nozzle body (1) includes a cylindrical casing (6) and a sliding shaft (7) that is slidable within the casing (6). The sliding shaft (7) is slidable in the axial direction relative to the casing (6) by operating a drive mechanism (30) that causes air to flow in and out of the nozzle body (1) through an air circulation port (28) formed in the mixed liquid discharge device (2) shown in Fig. 1.

[0015] The base end (8) of the casing (6) is fixed to a cylinder (10) provided in the mixed liquid discharge device (2), and a tip member (11) having a U-shaped cross section is fixed to the tip of the casing (6) as shown in Figures 1 and 3. A tip wall (12) corresponding to the bottom wall of the tip member (11) closes a tip opening (13) of the casing (6), and an outer peripheral wall (14) of the tip member (11) covers the tip outer periphery (15) of the casing (6).

[0016] 3, a discharge opening 3 is formed through the center of the tip wall 12, and an abutment surface 16 is provided on the inner surface of the tip wall 12, the diameter of which is tapered from the edge of the discharge opening 3. The tip of the sliding shaft 7 is provided with a tapered outer peripheral surface 17 that corresponds to the abutment surface 16.

[0017] By forming the contact surface 16 and the tip outer peripheral surface 17 as described above, the tip outer peripheral surface 17 of the sliding shaft 7 can come into surface contact with the contact surface 16 of the tip wall 12, as shown in Fig. 3. Therefore, by bringing the contact surface 16 of the tip wall 12 into surface contact with the tip outer peripheral surface 17 of the sliding shaft 7, it is possible to create a liquid-tight seal between the contact surface 16 and the tip outer peripheral surface 17, and therefore the discharge opening 3 of the tip wall 12 can be reliably closed.

[0018] In addition, as shown in Figure 3, a protruding flange (20) is provided on the outer surface of the tip wall (12) in the circumferential direction, with the opening edge of the discharge opening (3) protruding outward. This protruding flange (20) is provided so as to taper in the direction of protrusion from the discharge opening (3). By providing the protruding flange (20) as described above, when the discharge of the mixed liquid is stopped, the mixed liquid adhering to the discharge opening (3) does not remain due to its own surface tension, but drips onto the workpiece (5) through the discharge flange (20). Therefore, the mixed liquid does not remain in the discharge opening (3), making it possible to more effectively suppress dripping of the mixed liquid.

[0019] 3 and 5, a protruding wall 31, which is higher in protrusion height than the protruding flange 20, is provided on the surface of the tip wall 12 in an annular shape on the outer periphery at a fixed distance from the discharge opening 3. By providing the protruding wall 31 in this manner, it is possible to prevent the protruding flange 20 from coming into contact with the workpiece 5 or peripheral equipment and being crushed, and it is possible to maintain the protruding state of the protruding flange 20 in a good condition.

[0020] 1, a flow opening (21) is provided on the side of the casing (6) connected to the mixed liquid discharge device (2) to allow the mixed liquid transferred from the two-liquid mixer (4) to flow into the nozzle body. In addition, a flow passage (22) is provided continuous with the flow opening (21) to allow the mixed liquid to flow between the inner peripheral surface of the casing (6) and the outer peripheral surface of the sliding shaft (7).

[0021] 3 and 4, three outer peripheral projections 24 each having a trapezoidal cross section are provided at equal intervals in the circumferential direction on the outer periphery of the tip end of the sliding shaft 7. The outer peripheral projections 24 are sized to be able to abut against the inner periphery of the casing 6 and to be able to slide within the casing 6, as shown in FIG.

[0022] By forming three outer peripheral protrusions 24 as described above, three communication recesses 25 are formed at the intervals between the outer peripheral protrusions 24, as shown in Fig. 4. By forming the communication recesses 25 in this manner, a communication gap 26 is formed between the communication recesses 25 and the inner peripheral surface of the casing 6. Therefore, the flow passage 22 on the mixed liquid discharge device 2 side of the casing 6 and the flow passage 22 on the tip member 11 side can communicate with each other through the communication gap 26.

[0023] By providing the sliding shaft 7 with the outer peripheral protrusion 24 as described above, the sliding shaft 7 slides inside the casing 6 while the outer peripheral protrusion 24 abuts against the inner peripheral surface of the casing 6. This makes it less likely that the sliding shaft 7 will tilt radially from the axial direction inside the casing 6, causing the sliding to become unstable. This allows the sliding shaft 7 to slide smoothly in the axial direction inside the casing 6.

[0024] A method for discharging a mixed liquid using the nozzle body (1) configured as described above will be described below. First, as shown in Fig. 3, the sliding shaft (7) is slid toward the tip wall (12) in advance, and the outer circumferential surface of the sliding shaft (7) is brought into contact with the contact surface (16) of the tip wall (12), thereby closing the discharge opening (3) of the tip wall (12). Then, the mixed liquid is transferred from the two-liquid mixer (4) shown in Fig. 2 to the discharge device main body, and the mixed liquid flows into the flow passage (22) through the flow opening (21) of the casing (6).

[0025] As a result, the mixed liquid flows from the flow opening 21 through the communication recess 25 and remains in the area surrounded by the distal end wall 12 and the casing 6. In this state, by sliding the sliding shaft 7 toward the base end 8 of the casing 6 by the drive mechanism 30, a communication gap 26 is formed between the distal outer peripheral surface 17 of the sliding shaft 7 and the abutment surface 16, as shown in Fig. 5. As a result, the mixed liquid that has remained on the distal end wall 12 side of the flow passage 22 is discharged from the discharge opening 3 toward the workpiece 5 through the communication gap 26.

[0026] After the mixed liquid has been discharged onto the workpiece 5 for a certain period of time, the drive mechanism 30 is activated to slide the sliding shaft 7 toward the tip wall 12, so that the tip outer peripheral surface 17 of the sliding shaft 7 comes into contact with the contact surface 16, as shown in Figure 3, and the discharge opening 3 is closed. This completes the discharge of the mixed liquid onto the workpiece 5.

[0027] In this embodiment, as described above, when the discharge opening (3) is closed by abutting the sliding shaft (7) against the abutment surface (16) after the mixed liquid has been discharged from the nozzle body (1), the mixed liquid is less likely to remain outside the discharge opening (3) because no nozzle is formed outside the discharge opening (3).

[0028] Therefore, even when the nozzle body 1 is moved after the discharge opening 3 is closed to terminate the discharge of the mixed liquid from the nozzle body 1, it is possible to effectively prevent the mixed liquid from dripping from the nozzle body 1. In this embodiment, a protruding flange 20 is provided on the outer surface of the tip wall 12, protruding outward from the edge of the discharge opening 3.

[0029] Therefore, when the discharge opening (3) is closed to stop the discharge of the mixed liquid, the mixed liquid adhering to the discharge opening (3) does not remain due to its own surface tension, but drips onto the workpiece (5) through the discharge flange (20) and is completely discharged. Therefore, it is possible to more effectively suppress the dripping of the mixed liquid from the discharge opening (3). [Explanation of symbols]

[0030] 1 Nozzle body 2 Mixed liquid discharge device 3 Discharge opening 5 Work 6 Casing 7 Sliding shaft 12 Tip wall 16 Contact surface 20 Protruding tsuba 24 Outer periphery protrusion 25 Connecting recess

Claims

[Claim 1] a nozzle body provided in a mixed liquid discharge device that discharges a mixed liquid obtained by mixing a first liquid and a second liquid onto a workpiece, the nozzle body comprising: a cylindrical casing; and a sliding shaft that is slidable within the casing, the sliding shaft having a recess disposed in the center of the tip, and a tip outer peripheral surface that is provided with an O-ring on the outer periphery of the recess; a tip wall that covers the tip of the casing, the tip wall having a discharge opening for discharging the mixed liquid outward, an abutment surface on the inner surface of the tip wall that abuts in a liquid-tight manner against the tip outer peripheral surface of the sliding shaft to close the discharge opening; and a protruding flange that protrudes outward is provided on the outer surface of the tip wall around the opening edge of the discharge opening.

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