JP7493171B2 - Method for manufacturing nozzle and condenser - Google Patents

Description

This disclosure relates generally to a method for manufacturing a nozzle and a condenser, and more specifically to a nozzle for injecting a liquid into a container and a method for manufacturing a condenser using the nozzle.

The drip nozzle (nozzle) described in Patent Document 1 has a cylindrical wall with a nozzle hole formed inside. The inlet portion opens at the lower end position of the cylindrical wall, and the outlet portion opens at the upper end position of the cylindrical wall. The nozzle hole is set so that the inner diameter of the nozzle hole narrows sharply at the inlet portion, making the opening diameter at the inlet portion the smallest.

JP 2006-213350 A

In the drip nozzle (nozzle) described in Patent Document 1, water droplets, which are part of the liquid discharged from the outlet (discharge port), may scatter around the target (e.g., a container into which the liquid is poured), and there is a need to prevent this.

The present disclosure aims to provide a method for manufacturing a nozzle and a condenser that can reduce the possibility of water droplets scattering around the container.

A nozzle according to an aspect of the present disclosure injects a liquid into a container. The nozzle has an opening, a recess, an outlet, and a flow path. The recess is a portion recessed from the opening in a predetermined direction. The outlet is an outlet for the liquid. The outlet is formed on an inner surface of the recess. The outlet is aligned with the opening in the predetermined direction. The flow path is opened by the outlet. The flow path has a length from the outlet in the predetermined direction. The liquid flows through the flow path. The inner surface of the recess includes a tapered surface that intersects with the predetermined direction at an angle of less than 90 degrees. In a cross section along the predetermined direction, the width of a region of the recess where the tapered surface is provided increases as the width approaches the opening from the outlet. The tapered surface includes a curved surface portion whose shape in the cross section is a curve. The container is a capacitor package. The liquid is a substance that is used to be injected into the package.
A nozzle according to another aspect of the present disclosure injects liquid into a container. The nozzle has an opening, a recess, an outlet, and a flow path. The recess is a portion recessed in a predetermined direction from the opening. The outlet is an outlet for the liquid. The outlet is formed on an inner surface of the recess. The outlet is aligned with the opening in the predetermined direction. The flow path is opened by the outlet. The flow path has a length from the outlet in the predetermined direction. The liquid flows through the flow path. The recess penetrates the nozzle in a second direction perpendicular to a first direction as the predetermined direction.

In a method for manufacturing a capacitor according to one aspect of the present disclosure, the container is a capacitor package. The liquid is a substance that is intended to be injected into the package. The method for manufacturing a capacitor includes a step of injecting the liquid into the package using the nozzle.

The present disclosure has the advantage of reducing the possibility of water droplets splashing around the container.

Fig. 1A is a side cross-sectional view of a nozzle according to embodiment 1. Fig. 1B is a bottom view of the nozzle. 2A to 2C are side cross-sectional views illustrating an example of use of the nozzle. 3A and 3B are side cross-sectional views of a nozzle according to a comparative example. FIG. 4 is a side cross-sectional view of a nozzle according to the second embodiment. FIG. 5 is a side cross-sectional view of a nozzle according to the third embodiment. FIG. 6 is a side cross-sectional view of a nozzle according to the fourth embodiment. FIG. 7 is a side cross-sectional view of a nozzle according to the fifth embodiment. FIG. 8 is a perspective view of a nozzle according to the sixth embodiment. 9A and 9B are front and side sectional views of the nozzle of the same embodiment; FIG. 10 is a perspective view of a nozzle according to the seventh embodiment.

(Embodiment 1)
The manufacturing method of the nozzle 1 and the condenser according to the first embodiment will be described below with reference to the drawings. However, the following embodiment is merely one of various embodiments of the present disclosure. The following embodiment can be modified in various ways depending on the design, etc., as long as the object of the present disclosure can be achieved. In addition, each figure described in the following embodiment is a schematic diagram, and the ratio of the size and thickness of each component in the figure does not necessarily reflect the actual dimensional ratio.

(1) Configuration The nozzle 1 of this embodiment injects liquid L1 (shaded portion in FIG. 2A) into a container 9 (see FIG. 2A). As shown in FIG. 1A, the nozzle 1 has an opening 2, a recess 3, an outlet 4, and a flow path 5. The recess 3 is a portion that is recessed in a predetermined direction (first direction D1) from the opening 2. The outlet 4 is an outlet 4 for liquid L1 (see FIG. 2A). The outlet 4 is formed on the inner surface F1 of the recess 3. The outlet 4 is aligned in the predetermined direction (first direction D1) with respect to the opening 2. The flow path 5 is opened by the outlet 4. The flow path 5 has a length from the outlet 4 in the predetermined direction (first direction D1). Liquid L1 flows through the flow path 5.

During the process of ejecting liquid L1 from outlet 4 of nozzle 1, droplets L10 (see FIG. 2B) may be present inside recess 3 and remain at outlet 4 due to surface tension. According to this embodiment, the movement of droplets L10 in a direction perpendicular to the predetermined direction (first direction D1) is restricted by recess 3. This increases the likelihood that the movement direction of droplets L10 moving from outlet 4 and exiting opening 2 can be restricted to the direction opposite to the predetermined direction (first direction D1). This reduces the likelihood that droplets L10 exiting opening 2 will scatter around container 9.

The configuration of nozzle 1 is explained in more detail below.

The nozzle 1 is formed, for example, from PTFE (polytetrafluoroethylene). The outer shape of the nozzle 1 is a truncated cone. The flow path 5 penetrates the nozzle 1 in the height direction of the nozzle 1 (the direction in which the upper and lower bases face each other). This makes the nozzle 1 cylindrical. The first end of the flow path 5 has an outlet 4, and the second end of the flow path 5 has an inlet. The inlet is an opening. In other words, the first end of the flow path 5 is opened by the outlet 4, and the second end of the flow path 5 is opened by the inlet. The liquid L1 enters the flow path 5 from the inlet and exits from the outlet 4.

The flow path 5 has a length in the first direction D1 from the ejection port 4. In other words, at least the area of the flow path 5 that is continuous with the ejection port 4 has a length in the first direction D1. Therefore, the liquid L1 is ejected from the ejection port 4 in the opposite direction to the first direction D1. In this embodiment, the flow path 5 is formed in a straight line along the first direction D1. The height direction of the nozzle 1 is along the first direction D1.

The nozzle 1 is used in such a direction that the opening 2 is disposed below the discharge port 4. That is, the first direction D1 is along the opposite direction (upward) to the direction of gravity (downward). At this time, the discharge port 4 is disposed below the inlet portion. The nozzle 1 drops the liquid L1 from the discharge port 4 into the container 9 located below the opening 2 by at least gravity (see FIG. 2A). The nozzle 1 may also be used together with a driving mechanism that drives the liquid L1. The driving mechanism is, for example, a pump. The driving mechanism imparts kinetic energy to the liquid L1. As a result, the liquid L1 is discharged from the discharge port 4 into the container 9 via the flow path 5.

The nozzle 1 has an opening 2 at its tip (lower end) in the direction opposite to the first direction D1. The nozzle 1 has a recess 3. The recess 3 is a portion recessed in the first direction D1 from the opening 2. In other words, the recess 3 is a portion recessed upward from the opening 2. The nozzle 1 has an outlet 4 on the inner surface F1 of the recess 3. The outlet 4 is located above the opening 2. As shown in FIG. 1B, the outlet 4 and the opening 2 each have a circular shape when viewed from the first direction D1. The area of the outlet 4 is smaller than the area of the opening 2. An example of the diameter of the outlet 4 is 0.8 to 0.9 mm. An example of the diameter of the opening 2 is 1.2 to 3.5 mm.

As shown in FIG. 1B, when viewed from the first direction D1, the outlet 4 includes the center C2 of the opening 2. When viewed from the first direction D1, the center C2 of the opening 2 coincides with the center C4 of the outlet 4. Furthermore, when viewed from the first direction D1, the shape of the outlet 4 is similar to the shape of the opening 2. In other words, when viewed from the first direction D1, the opening 2 is concentric with the outlet 4.

The nozzle 1 includes a flat surface 60 on the periphery of the opening 2. The flat surface 60 is perpendicular to the first direction D1. The flat surface 60 is the bottom surface of the nozzle 1. When viewed from the first direction D1, the shape of the flat surface 60 is annular.

1A, the inner surface F1 of the recess 3 includes a tapered surface F11. In this embodiment, the entire inner surface F1 of the recess 3 is the tapered surface F11. The tapered surface F11 intersects with the first direction D1 at an angle of less than 90 degrees. In a cross section along the first direction D1 (for example, the cross section shown in FIG. 1A), the width of the region of the recess 3 where the tapered surface F11 is provided is larger as it approaches the opening 2 from the discharge port 4. In other words, in a cross section along the vertical direction, the width of the region of the recess 3 where the tapered surface F11 is provided is larger as it goes downward. In other words, the inner diameter of the region of the recess 3 where the tapered surface F11 is provided is larger as it goes downward. The width of the recess 3 referred to here is the width in the second direction D2 and the opposite direction. The second direction D2 is perpendicular to the first direction D1 (upward direction) on the cross section along the vertical direction. In this disclosure, "perpendicular" is not limited to strictly intersecting at an angle of 90 degrees. "Orthogonal" can include, for example, intersections at an angle of 85 degrees or more and 95 degrees or less.

The tapered surface F11 includes a curved portion whose shape in a cross section (e.g., the cross section shown in FIG. 1A) along the first direction D1 is a curved line. In this embodiment, the entire tapered surface F11 is a curved portion. The shape of the curved portion is a concave spherical shape having a center of curvature C1 (center) at the following position (wherein a concave spherical surface is defined as the inner surface of a hollow sphere). The position of the center of curvature C1 is a position on the opening 2 side as viewed from the discharge port 4, and faces the discharge port 4 in the first direction D1. In this embodiment, as viewed from the first direction D1, the center of curvature C1 overlaps with the center C4 of the discharge port 4. In this disclosure, the term "concave spherical shape" is a concept that includes a concave spherical surface and a shape similar to a concave spherical surface (e.g., the inner surface of a hollow ellipsoid and a paraboloid).

The inner surface F1 of the recess 3 includes a surrounding portion F31 (see FIG. 1B). The surrounding portion F31 is adjacent to the discharge port 4. The surrounding portion F31 surrounds the discharge port 4 when viewed from the first direction D1. The surrounding portion F31 includes at least a portion of the tapered surface F11. In other words, the shape of the region (surrounding portion F31) of the inner surface F1 of the recess 3 that is adjacent to the discharge port 4 and surrounds the discharge port 4 is tapered. The surrounding portion F31 is a surface of rotation. The axis of rotation of the surface of rotation (surrounding portion F31) is a straight line SL1 that passes through the center C4 of the discharge port 4 and extends in the first direction D1. In this embodiment, the entire inner surface F1 (tapered surface F11) is a surface of rotation.

(2) Example of Use Next, an example of use of the nozzle 1 will be described with reference to Figures 2A to 2C. The nozzle 1 is used for the purpose of injecting liquid L1 into a container 9. Here, the following case will be described as an example. That is, here, the container 9 is a capacitor package, and the liquid L1 is a substance that is intended to be injected into the package. The liquid L1 is, for example, an electrolyte.

The method for manufacturing a capacitor according to one embodiment includes a step of injecting liquid L1 into a package (container 9) using a nozzle 1 (see FIG. 2A). That is, in this step, liquid L1 discharged from an outlet 4 is injected into the package (container 9). The time required from starting injection of liquid L1 into one container 9 to finishing injection of liquid L1 into this container 9 is, for example, several tens of milliseconds to several hundreds of milliseconds. The time required from starting injection of liquid L1 into one container 9 to starting injection of liquid L1 into the next container 9 is, for example, several hundreds of milliseconds to several seconds.

The shape of the container 9 is, for example, a cylindrical shape with a bottom. The container 9 is placed in a state in which the opening 90 of the container 9 faces upward. The container 9 is placed under the nozzle 1. Then, the liquid L1 discharged from the outlet 4 of the nozzle 1 falls into the inside of the container 9 through the opening 90 (see FIG. 2A).

When the supply of liquid L1 to the flow path 5 of the nozzle 1 is cut off, the surface tension of the liquid L1 balances with gravity, preventing the liquid L1 from falling from the discharge port 4, as shown in FIG. 2B. In other words, the tip (bottom) of the liquid L1 remains at the bottom of the nozzle 1. The tip (bottom) of the liquid L1 may become a spherical water droplet L10, as shown in FIG. 2B.

Here, Fig. 3A and Fig. 3B show a nozzle 1P according to a comparative example. The nozzle 1P does not have an opening 2 or a recess 3. The nozzle 1P has an outlet 4 and a flow path 5. The outlet 4 is formed in the center of a flat surface 60, which is the lower surface of the nozzle 1P.

3A, in the nozzle 1P, the water droplet L10 generated at the tip (lower end) of the liquid L1 may be positioned in a direction (horizontal direction) perpendicular to the vertical direction. In other words, the center of the water droplet L10 may be shifted from the center C4 of the discharge port 4. In FIG. 3A, the contact area between the water droplet L10 and the region of the flat surface 60 to the right of the discharge port 4 is larger than the contact area between the water droplet L10 and the region of the flat surface 60 to the left of the discharge port 4. Then, a difference occurs in the surface tension generated between the water droplet L10 and the flat surface 60 on the right and left sides of the discharge port 4. That is, the component of the surface tension that moves the water droplet L10 to the right is larger than the component that moves the water droplet L10 to the left. Then, when the water droplet L10 drips from the discharge port 4, the water droplet L10 drips as if it is pulled to the right, as shown in FIG. 3B. Therefore, the water droplet L10 may scatter around the container 9.

In contrast, in the nozzle 1 of this embodiment (see FIG. 2B), the movement of the water droplet L10 in a direction perpendicular to the first direction D1 is restricted by the recess 3. In other words, the center of the water droplet L10 is unlikely to shift from the center C4 of the discharge port 4. This reduces the possibility that the magnitude of the surface tension acting on the water droplet L10 will be biased in a certain direction. Therefore, even if the water droplet L10 drips from the discharge port 4 (see FIG. 2C), the water droplet L10 is unlikely to fall obliquely with respect to the first direction D1, so that the water droplet L10 coming out of the opening 2 is less likely to scatter around the container 9. In other words, the possibility that the water droplet L10 can be dropped into the container 9 is increased.

In particular, when the viscosity of the liquid L1 is relatively high (for example, when the viscosity of the liquid L1 is higher than that of water), when the supply of the liquid L1 to the flow path 5 is cut off, the part of the liquid L1 that falls below the discharge port 4 is likely to pull the part of the liquid L1 inside the flow path 5 out of the discharge port 4. Therefore, water droplets L10 are likely to be generated at the discharge port 4. However, by using the nozzle 1 of this embodiment, the possibility that the water droplets L10 will scatter around the container 9 can be reduced. Therefore, regardless of the viscosity of the liquid L1, the process of discharging the liquid L1 from the nozzle 1 can be performed while reducing the possibility that the water droplets L10 will scatter around the container 9. Examples of the liquid L1 with a relatively high viscosity include glycol-based solvents such as alkylene glycol-based aqueous solutions (e.g., ethylene glycol-based aqueous solutions, propylene glycol-based aqueous solutions) and polyalkylene glycol-based aqueous solutions (e.g., polyethylene glycol-based aqueous solutions), glycerin-based aqueous solutions, and polyglycerin-based aqueous solutions. The viscosity of the liquid L1, which has a relatively high viscosity, is, for example, 100 mPa·s or more, or even 150 mPa·s or more, when the temperature of the liquid L1 is 20 degrees.

In addition, since the inner surface F1 of the recess 3 includes the tapered surface F11, the contact area between the water droplet L10 remaining at the discharge port 4 and the inner surface F1 of the recess 3 (tapered surface F11) can be increased compared to when the tapered surface F11 is not present. This reduces the possibility that the water droplet L10 will drip from the discharge port 4. For example, even when the nozzle 1 vibrates, the possibility that the water droplet L10 will drip from the discharge port 4 can be reduced. Moreover, since the tapered surface F11 has a concave spherical shape, the contact area between the water droplet L10 and the tapered surface F11 can be increased compared to when the tapered surface F11 has a shape equivalent to the inner surface of a hollow truncated cone, for example.

(Modification of the first embodiment)
Modifications of the first embodiment are listed below. The following modifications may be implemented in appropriate combination. The following modifications may also be applied to embodiments other than the first embodiment. The embodiments other than the first embodiment will be described later.

The direction in which the nozzle 1 is used is not limited to the direction in which the opening 2 is disposed below the discharge port 4. For example, the direction in which the nozzle 1 is used may be oblique to the direction in which the opening 2 is disposed below the discharge port 4.

The shape of the opening 2 and the discharge port 4 as viewed from the first direction D1 is not limited to a circle, but may be, for example, an ellipse or a polygon.

The nozzle 1 may not include a flat surface 60. In other words, the width of the flat surface 60 in the radial direction of the nozzle 1 may be 0 or approximately 0.

The nozzle 1 may be equipped with a rectifier. The rectifier is disposed at the opening 2 or the discharge port 4. The rectifier is a member that adjusts the discharge direction of the liquid L1 to a downward direction (opposite the first direction D1). The shape of the rectifier is, for example, a cylindrical shape having a height (axis) in the first direction D1, and the shape of the rectifier seen from the first direction D1 is a star shape. The rectifier is disposed, for example, so as to be inscribed in the opening 2 (or the discharge port 4).

The first section including the flow path 5 and the second section including the recess 3 of the nozzle 1 may be formed separately and then attached to each other. That is, the second section may be an attachment that is attached to the first section. The first section and the second section may be configured to be detachable from each other. The inner surface F1 of the recess 3 of the second section may be formed from a material that is more water repellent than the inner surface of the flow path 5 of the first section.

(Embodiment 2)
Hereinafter, a nozzle 1A according to the second embodiment will be described with reference to Fig. 4. The same components as those in the first embodiment will be denoted by the same reference numerals and the description thereof will be omitted.

In nozzle 1A, the shape of the inner surface F1 of the recess 3 differs from that in embodiment 1. The inner surface F1 includes a tapered surface F12. In this embodiment, the entire inner surface F1 of the recess 3 is a tapered surface F12.

The tapered surface F12 has the following characteristics similar to those of the tapered surface F11 of embodiment 1. That is, the tapered surface F12 intersects with the first direction D1 at an angle of less than 90 degrees. In a cross section along the first direction D1 (for example, the cross section shown in FIG. 4), the width of the region of the recess 3 in which the tapered surface F12 is provided increases the closer it is to the opening 2 from the discharge port 4. The tapered surface F12 is a surface of rotation. The axis of rotation of the surface of rotation (tapered surface F12) is a straight line SL1 that passes through the center C4 of the discharge port 4 and extends in the first direction D1.

The tapered surface F12 has the following features that differ from the tapered surface F11 of embodiment 1. That is, the tapered surface F12 includes a linear tapered surface. In this embodiment, the entire tapered surface F12 is a linear tapered surface. The shape of the linear tapered surface in a cross section along the first direction D1 is linear. In the cross section along the first direction D1, the acute angle θ1 between a straight line SL2 extending in the first direction D1 and the linear tapered surface is 45 degrees or more and 80 degrees or less. In this embodiment, the acute angle θ1 is about 50 to 60 degrees. The shape of the tapered surface F12 corresponds to the inner surface of a hollow truncated cone.

The inner surface F1 of the recess 3 includes a tapered surface F12, so the contact area between the water droplet L10 remaining at the discharge port 4 and the inner surface F1 (tapered surface F12) of the recess 3 can be made larger than when the tapered surface F12 is not present. Therefore, in this embodiment, as in the first embodiment, the possibility of the water droplet L10 dripping from the discharge port 4 can be reduced.

In addition, because the acute angle θ1 is 45 degrees or more, the possibility that the water droplet L10 will move in a direction perpendicular to the first direction D1 can be reduced compared to when the acute angle θ1 is less than 45 degrees. In addition, because the acute angle θ1 is 80 degrees or less, the surface tension generated between the water droplet L10 and the tapered surface F12 is greater compared to when the acute angle θ1 is greater than 80 degrees, so the possibility that the water droplet L10 will drip from the discharge port 4 can be reduced.

(Embodiment 3)
Hereinafter, a nozzle 1B according to the third embodiment will be described with reference to Fig. 5. The same components as those in the first embodiment will be denoted by the same reference numerals and the description thereof will be omitted.

In nozzle 1B, the shape of the inner surface F1 of the recess 3 differs from that in embodiment 1. The inner surface F1 includes a tapered surface F13. In this embodiment, the entire inner surface F1 of the recess 3 is a tapered surface F13.

The tapered surface F13 has the following characteristics similar to those of the tapered surface F11 of the first embodiment. That is, the tapered surface F13 intersects with the first direction D1 at an angle of less than 90 degrees. In a cross section along the first direction D1 (for example, the cross section shown in FIG. 5), the width of the region of the recess 3 where the tapered surface F13 is provided increases the closer it is to the opening 2 from the discharge port 4. The tapered surface F13 of the recess 3 includes a curved surface portion whose shape in a cross section along the first direction D1 is a curve. In this embodiment, the entire tapered surface F13 is a curved surface portion. The curve is a circular arc. The tapered surface F13 is a surface of revolution. The axis of revolution of the surface of revolution (tapered surface F13) is a straight line SL1 that passes through the center C4 of the discharge port 4 and extends in the first direction D1.

The tapered surface F13 also has the following features that differ from the tapered surface F11 of embodiment 1. That is, in a cross section along the first direction D1, the position of the center of curvature C1 (center) of the curve that forms the curved surface portion is outside the flow path 5 when viewed from the first direction D1. The curved surface portion is a surface of rotation that is formed by rotating the above curve. The axis of rotation of the above surface of rotation is a straight line SL1 that passes through the center C4 of the discharge port 4 and extends in the first direction D1.

As in embodiment 1, this embodiment also reduces the possibility of the water droplets L10 dripping from the discharge port 4 compared to a case in which the tapered surface F12 is not present.

(Embodiment 4)
A nozzle 1C according to the fourth embodiment will be described below with reference to Fig. 6. The same components as those in the first embodiment will be denoted by the same reference numerals and description thereof will be omitted.

In nozzle 1C, the shape of the inner surface F1 of the recess 3 differs from that of embodiment 1. The inner surface F1 includes a flat surface portion F14. The flat surface portion F14 is perpendicular to the first direction D1. The flat surface portion F14 surrounds the discharge port 4. In other words, when viewed from the first direction D1, the shape of the flat surface portion F14 is annular, and the discharge port 4 is formed inside the flat surface portion F14.

The inner surface F1 further includes a wall surface F15. The shape of the wall surface F15 corresponds to the inner surface of a tube (cylinder). The wall surface F15 extends downward from the outer edge of the flat surface portion F14. The flat surface portion F14 and the discharge port 4 are provided at the upper end of the space surrounded by the wall surface F15, and the opening 2 is provided at the lower end.

The inner surface F1 of the recess 3 includes a surrounding portion F32. The surrounding portion F32 is adjacent to the discharge port 4. The surrounding portion F32 surrounds the discharge port 4 when viewed from the first direction D1. The surrounding portion F32 includes at least a portion of the planar portion F14. In other words, the shape of the region (surrounding portion F32) of the inner surface F1 of the recess 3 that is adjacent to the discharge port 4 and surrounds the discharge port 4 is planar.

The movement of the water droplet L10 remaining at the discharge port 4 in a direction perpendicular to the first direction D1 is restricted by the recess 3 (wall surface F15). In other words, the center of the water droplet L10 is unlikely to deviate from the center C4 of the discharge port 4. This reduces the possibility that the magnitude of the surface tension acting on the water droplet L10 will be biased in a certain direction. Therefore, in this embodiment as well, as in embodiment 1, it is possible to reduce the possibility that the water droplet L10 exiting the opening 2 will splash around the container 9.

(Embodiment 5)
A nozzle 1D according to the fifth embodiment will be described below with reference to Fig. 7. The same components as those in the first embodiment will be denoted by the same reference numerals and description thereof will be omitted.

In nozzle 1D, the shape of the inner surface F1 of the recess 3 differs from that in embodiment 1. The inner surface F1 has a shape that connects the tapered surface F11 of embodiment 1 and the tapered surface F12 of embodiment 2. That is, the inner surface F1 includes tapered surfaces F11 and F12. The shape of tapered surface F11 is a concave spherical shape. The shape of tapered surface F12 is a shape that corresponds to the inner surface of a hollow truncated cone. Tapered surface F12 is provided adjacent to the discharge port 4. Tapered surface F11 is provided below tapered surface F12. The lower end of tapered surface F12 is connected to the upper end of tapered surface F11. An opening 2 is provided at the lower end of tapered surface F11.

As in embodiment 1, this embodiment also reduces the possibility of water droplets L10 dripping from the discharge port 4 compared to when neither tapered surface F11 nor F12 is present.

(Modification of the fifth embodiment)
Modifications of the fifth embodiment are listed below. In the fifth embodiment, the region where the tapered surface F12 is provided is referred to as the first region, and the region where the tapered surface F11 is provided is referred to as the second region. In other words, the region adjacent to the ejection port 4 is the first region, and the region below the first region is the second region.

The first region may have one of the tapered surfaces F11 to F13, and the second region may have one of the tapered surfaces F11 to F13, the flat surface F14, and the wall surface F15.

Alternatively, the first region may be provided with a flat surface portion F14, and the second region may be provided with one of the tapered surfaces F11 to F13.

In the above, an example has been described in which the inner surface F1 of the recess 3 is composed of a combination of two surfaces selected from among the tapered surfaces F11 to F13, the flat surface F14, and the wall surface F15, but the inner surface F1 may be composed of a combination of three or more surfaces. In other words, two or more surfaces selected from the tapered surfaces F11 to F13, the flat surface F14, and the wall surface F15 may be provided below the second region. Note that the inner surface F1 may include multiple surfaces of the same shape. For example, the inner surface F1 may include multiple tapered surfaces F11.

In addition, the tapered surfaces F11 to F13, the flat surface F14, and the wall surface F15 are merely examples of the shape of at least a portion of the inner surface F1 of the recess 3, and the inner surface F1 may include surfaces of shapes other than these.

(Embodiment 6)
Hereinafter, a nozzle 1E according to the sixth embodiment will be described with reference to Figures 8 to 9B. The same components as those in the first embodiment will be denoted by the same reference numerals and the description thereof will be omitted.

In nozzle 1E, the shape of the recess 3 differs from that in embodiment 1. The shape of the recess 3 is a groove formed in the flat surface 60 (lower surface) of nozzle 1E. The shape of the internal space of the recess 3 is a rectangular parallelepiped. That is, the inner surface F1 of the recess 3 includes a bottom surface F16 and two side surfaces F17. The bottom surface F16 is flat and perpendicular to the first direction D1. The discharge port 4 is formed in the bottom surface F16. The two side surfaces F17 are surfaces along the first direction D1 and connect the bottom surface F16 and the flat surface 60.

Here, the direction perpendicular to both the first direction D1 and the second direction D2 is defined as the third direction D3. The length of the recess 3 in the second direction D2 is longer than the length of the recess 3 in the third direction D3. The recess 3 penetrates the nozzle 1E in the second direction D2. Furthermore, the recess 3 penetrates the nozzle 1E in the opposite direction to the second direction D2. That is, the recess 3 is formed across both ends of the nozzle 1E in the second direction D2, and the nozzle 1E has a through portion 301 at each end in the second direction D2 and the end opposite thereto. The through portion 301 is a hole provided in the side surface 101 of the nozzle 1E.

When the supply of liquid L1 to the flow path 5 is cut off, as shown in Figures 9A and 9B, the water droplets L10 that are generated outside the discharge port 4 accumulate inside the recess 3 due to surface tension. The presence of the recess 3 increases the surface tension of the water droplets L10 compared to the nozzle 1P (see Figure 3A) of the comparative example, improving liquid drainage.

(Embodiment 7)
A nozzle 1F according to the seventh embodiment will be described below with reference to Fig. 10. The same components as those in the sixth embodiment will be denoted by the same reference numerals and description thereof will be omitted.

In nozzle 1F, the shape of recess 3 differs from that in embodiment 6. When viewed from below, recess 3 is cross-shaped. That is, the internal space of recess 3 has region R1 and region R2. Region R1 is a region that extends between both ends of nozzle 1F in second direction D2. Region R2 is a region that extends between both ends of nozzle 1F in third direction D3 that intersects (here, perpendicular to) second direction D2 on a plane perpendicular to first direction D1. Region R1 and region R2 intersect below discharge port 4.

Nozzle 1F has through-holes 301 at both ends in region R1, and through-holes 302 at both ends in region R2. Through-holes 301, 302 are holes provided in side surface 101 of nozzle 1F. That is, recess 3 penetrates nozzle 1F in second direction D2, and also penetrates nozzle 1F in third direction D3 that intersects (here, perpendicular to) second direction D2 on a plane perpendicular to first direction D1. Furthermore, recess 3 penetrates nozzle 1F in the direction opposite second direction D2, and also penetrates nozzle 1F in the direction opposite third direction D3.

In this embodiment, as in embodiment 6, the presence of the depression 3 increases the surface tension of the water droplet L10 compared to the nozzle 1P of the comparative example (see FIG. 3A), improving the liquid drainage.

The number of holes (through holes 301 and 302) provided on the side surface 101 of the nozzle 1F and connected to the internal space of the recess 3 is not limited to two or four, but may be one, three, five or more.

(summary)
The above-described embodiments and the like disclose the following aspects.

The nozzle (1, 1A-1F) according to the first aspect injects liquid (L1) into a container (9). The nozzle (1, 1A-1F) has an opening (2), a recess (3), an outlet (4), and a flow path (5). The recess (3) is a portion recessed in a predetermined direction (first direction D1) from the opening (2). The outlet (4) is an outlet (4) for liquid (L1). The outlet (4) is formed on the inner surface (F1) of the recess (3). The outlet (4) is aligned in a predetermined direction with respect to the opening (2). The flow path (5) is opened by the outlet (4). The flow path (5) has a length in a predetermined direction from the outlet (4). The liquid (L1) flows through the flow path (5).

According to the above configuration, when the liquid (L1) is discharged from the discharge port (4), a water droplet (L10) may be present inside the recess (3) and remain at the discharge port (4) due to surface tension. The movement of this water droplet (L10) in a direction perpendicular to the specified direction (first direction D1) is restricted by the recess (3). This reduces the possibility that the position of the water droplet (L10) will shift relative to the discharge port (4), thereby reducing the possibility that the magnitude of the surface tension acting on the water droplet (L10) will be biased in one direction. This reduces the possibility that the water droplet (L10) coming out of the opening (2) will splash around the container (9).

In addition, in the nozzles (1, 1A-1F) according to the second aspect, in the first aspect, the discharge port (4) includes the center (C2) of the opening (2) when viewed from a specific direction (first direction D1).

The above configuration makes it easier to guide the water droplets (L10) moving from the discharge port (4) to the opening (2).

In addition, in the nozzles (1, 1A-1F) according to the third aspect, in the second aspect, the shape of the discharge port (4) is similar to the shape of the opening (2) when viewed from a specific direction (first direction D1).

The above configuration makes it easier to guide the water droplets (L10) moving from the discharge port (4) to the opening (2).

The nozzle (1, 1A-1F) according to the fourth aspect is used in any one of the first to third aspects with the opening (2) positioned below the discharge port (4). The nozzle (1, 1A-1D) drops the liquid (L1) from the discharge port (4) into the container (9) located below the opening (2) by at least gravity.

The above configuration increases the possibility of restricting the direction of movement of the water droplets (L10) moving from the discharge port (4) and exiting through the opening (2) to the direction of gravity.

In addition, in the nozzle (1, 1A, 1B, 1D) according to the fifth aspect, in any one of the first to fourth aspects, the inner surface (F1) of the recess (3) includes tapered surfaces (F11 to F13). The tapered surfaces (F11 to F13) intersect with a predetermined direction (first direction D1) at an angle of less than 90 degrees. In a cross section along the predetermined direction, the width of the region of the recess (3) in which the tapered surfaces (F11 to F13) are provided increases the closer it is to the opening (2) from the discharge port (4).

The above configuration makes it possible to increase the contact area between the water droplets (L10) remaining at the discharge port (4) and the inner surface (F1) of the recess (3) compared to a case where there are no tapered surfaces (F11 to F13). This reduces the possibility that the water droplets (L10) remaining at the discharge port (4) will leave the discharge port (4) (drip down).

In the nozzle (1A, 1D) according to the sixth aspect, in the fifth aspect, the tapered surface (F12) includes a linear tapered surface. The shape of the linear tapered surface in a cross section along a predetermined direction (first direction D1) is linear. In the cross section along the predetermined direction, the acute angle (θ1) between a straight line (SL2) extending in the predetermined direction and the linear tapered surface is 45 degrees or more and 80 degrees or less.

The above configuration makes it possible to increase the contact area between the water droplets (L10) remaining at the discharge port (4) and the inner surface (F1) of the recess (3) compared to when there is no tapered surface (F12).

In addition, in the nozzle (1, 1B, 1D) according to the seventh aspect, in the fifth or sixth aspect, the tapered surface (F11, F13) includes a curved portion. The shape of the curved portion in a cross section along a predetermined direction (first direction D1) is a curve.

The above configuration can further increase the contact area between the water droplets (L10) remaining at the discharge port (4) and the inner surface (F1) of the recess (3).

In addition, in the nozzle (1, 1D) according to the eighth aspect, in the seventh aspect, the concave spherical surface is defined as the inner surface of a hollow sphere. The shape of the curved portion is a concave spherical shape having a center of curvature (C1) at the following position. The position of the center of curvature (C1) is a position on the opening (2) side as viewed from the discharge port (4) and faces the discharge port (4) in a specified direction (first direction D1).

The above configuration can further increase the contact area between the water droplets (L10) remaining at the discharge port (4) and the inner surface (F1) of the recess (3).

In addition, in the nozzle (1, 1A, 1B, 1D) according to the ninth aspect, in any one of the fifth to eighth aspects, the inner surface (F1) of the recess (3) includes a surrounding portion (F31). The surrounding portion (F31) is adjacent to the discharge port (4). The surrounding portion (F31) surrounds the discharge port (4) when viewed from a predetermined direction (first direction D1). The surrounding portion (F31) includes at least a portion of the tapered surfaces (F11 to F13).

The above configuration makes it possible to increase the contact area between the water droplets (L10) remaining at the discharge port (4) and the inner surface (F1) of the recess (3) compared to when the surrounding portion (F31) is not present.

In the nozzle (1, 1A, 1B, 1D) according to the tenth aspect, in the ninth aspect, the surrounding portion (F31) is a surface of rotation. The axis of rotation of the surface of rotation is a straight line (SL1) that passes through the center (C4) of the discharge port (4) and extends in a predetermined direction (first direction D1).

The above configuration makes it easier to keep the water droplets (L10) at the center (C4) of the discharge port (4).

In addition, the nozzle (1, 1A, 1C, 1D) according to the eleventh aspect includes a flat surface (60) on the periphery of the opening (2) in any one of the first to tenth aspects. The flat surface (60) is perpendicular to the predetermined direction (first direction D1).

The above configuration ensures sufficient thickness around the periphery of the opening (2).

In addition, in the nozzle (1E, 1F) according to the twelfth aspect, in any one of the first to eleventh aspects, the recess (3) penetrates the nozzle (1E, 1F) in the second direction (D2). The second direction (D2) is perpendicular to the first direction (D1) as the predetermined direction.

The above configuration allows for better liquid drainage.

In the nozzle (1F) according to the thirteenth aspect, in the twelfth aspect, the recess (3) penetrates the nozzle (1F) in the second direction (D2) and also penetrates the nozzle (1F) in the third direction (D3). The third direction (D3) intersects with the second direction (D2) on a plane perpendicular to the first direction (D1).

The above configuration allows for better liquid drainage.

In addition, in the nozzle (1, 1A to 1F) according to the 14th aspect, in any one of the first to 13th aspects, the container (9) is a capacitor package. The liquid (L1) is a substance that is intended to be injected into the package.

The above configuration reduces the possibility that water droplets (L10) coming out of the opening (2) will scatter around the package during the capacitor manufacturing process. In addition, the amount of liquid (L1) injected into the capacitor container (9) can be more accurately controlled. Furthermore, even when a high-viscosity liquid (L1) is used, the amount of liquid (L1) injected into the capacitor container (9) can be more accurately controlled.

The configurations other than the first aspect are not essential to the nozzles (1, 1A to 1F) and may be omitted as appropriate.

The method for manufacturing a capacitor according to the fifteenth aspect also includes a step of injecting liquid (L1) into a package (container 9) using the nozzle (1, 1A to 1F) according to the fourteenth aspect.

The above configuration reduces the possibility of water droplets (L10) coming out of the opening (2) scattering around the package during the capacitor manufacturing process.

1, 1A to 1F Nozzle 2 Opening 3 Cavity 4 Discharge port 5 Flow path 9 Container (package)
60 Flat surface D1 First direction (predetermined direction)
D2 Second direction D3 Third direction F1 Inner surface F31 Enclosure portion C1 Center of curvature C2 Center C4 Centers F11, F13 Tapered surface (curved surface portion)
F12 Tapered surface (linear tapered surface)
L1 Liquid SL1 Line SL2 Line θ1 Acute angle

Claims (13)

A nozzle for injecting liquid into a container,
The nozzle is
An opening;
A recess recessed in a predetermined direction from the opening;
an ejection port for the liquid formed on an inner surface of the recess and aligned in the predetermined direction with respect to the opening;
a flow path that is opened by the discharge port, has a length from the discharge port in the predetermined direction, and through which the liquid flows;
the inner surface of the recess includes a tapered surface that intersects with the predetermined direction at an angle of less than 90 degrees;
In a cross section along the predetermined direction, a width of a region of the recess where the tapered surface is provided increases as the region approaches the opening from the discharge port,
the tapered surface includes a curved surface portion having a curved shape in the cross section,
the container is a capacitor package;
The liquid is a substance that has an intended use and is injected into the package.
nozzle. When viewed from the predetermined direction, the discharge port includes a center of the opening portion.
The nozzle of claim 1 . When viewed from the predetermined direction, the shape of the discharge port is similar to the shape of the opening portion.
The nozzle of claim 2. The nozzle is used in an orientation in which the opening is disposed below the discharge outlet, and the liquid falls from the discharge outlet into the container located below the opening by at least gravity.
A nozzle according to any one of claims 1 to 3. The tapered surface includes a linear tapered surface having a linear shape in the cross section,
In the cross section, an acute angle between a straight line extending in the predetermined direction and the linear tapered surface is greater than or equal to 45 degrees and less than or equal to 80 degrees.
A nozzle according to any one of claims 1 to 4. A concave spherical surface is defined as the inner surface of a hollow sphere,
the shape of the curved surface portion is a concave spherical shape having a center of curvature at a position on the opening side as viewed from the ejection port and facing the ejection port in the predetermined direction;
A nozzle according to any one of claims 1 to 5. the inner surface of the recess includes a surrounding portion adjacent to the discharge port and surrounding the discharge port when viewed from the predetermined direction,
The surrounding portion includes at least a part of the tapered surface.
A nozzle according to any one of claims 1 to 6. the enclosure is a surface of revolution;
The rotation axis of the rotation surface is a straight line passing through the center of the discharge port and extending in the predetermined direction.
The nozzle of claim 7. The periphery of the opening includes a flat surface perpendicular to the predetermined direction.
A nozzle according to any one of claims 1 to 8. A nozzle for injecting liquid into a container,
The nozzle is
An opening;
A recess recessed in a predetermined direction from the opening;
an ejection port for the liquid formed on an inner surface of the recess and aligned in the predetermined direction with respect to the opening;
a flow path that is opened by the discharge port, has a length from the discharge port in the predetermined direction, and through which the liquid flows;
The recess penetrates the nozzle in a second direction perpendicular to the first direction as the predetermined direction.
Nozzle. the recess penetrates the nozzle in the second direction and also penetrates the nozzle in a third direction intersecting the second direction on a plane perpendicular to the first direction.
The nozzle of claim 10. the container is a capacitor package;
The liquid is a substance that has an intended use and is injected into the package.
12. A nozzle according to claim 10 or 11. Injecting the liquid into the package using a nozzle according to any one of claims 1 to 9.
How a capacitor is manufactured.

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