JP2005177592A - Coating nozzle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a coating nozzle capable of easily cleaning a nozzle forming face when a nozzle is clogged with a coating material or the like while having a slit-shaped nozzle narrow in width and wide in area. <P>SOLUTION: The coating nozzle 40 mounted on a coating head comprises a main body 45 provided with a circulating hole communicating with the coating head; a first opening and closing member 45R including a first base part 51R provided with a first nozzle forming face and a first arm part 54R extending from the first base part and pivotally supported by the main body, and holding a nozzle forming position or a nozzle opening position by a turn; and a second opening and closing member 45L including a second base part provided with a second nozzle forming face and a second arm part extending from the second base part and pivotally supported by the main body, and holding the nozzle forming position or the nozzle opening position by the turn. When the first opening and closing member and the second opening and closing member are respectively placed at the nozzle forming position, the first nozzle forming face and the second nozzle forming face divide the slit-shaped nozzle 60 communicating with the circulating hole of the main body. On the other hand, when the first opening and closing member and the second opening and closing member are respectively placed at the nozzle opening position, a cleaning member 73 can come in contact with the first nozzle forming face and the second nozzle forming face. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an application nozzle that discharges a coating material that forms a resin product, for example, to apply a coating material that forms a skin layer of a resin product.

  A vehicle's instrumental panel (hereinafter referred to as “instrument panel”), which is one of resin products, generally has a base material, a foam layer laminated thereon, and a skin layer laminated thereon (outermost surface). Consists of. When manufacturing instrument panels, the base material is usually applied to the core mold to form the base (the base prepared in a separate process may be attached), and the skin layer is applied to the mold by applying the skin layer material. Form. Next, the convex part of the core mold is fitted into the concave part of the mold mold, and an unfoamed layer material is injected into the gap between the two, and foamed and solidified.

  The conventional coating nozzle shown in FIGS. 6, 7 and 8 (see Patent Document 1) is formed by connecting a main body portion 80 and a lid portion 82 with screws 81, a nozzle passage 83, an internal space 85, and an introduction passage. 88 is partitioned. More specifically, the nozzle passage 83 has a lead-out port 84 at one end and an introduction port 85 at the other end, and the width gradually changes between the two. An internal space 87 extends along the introduction port 85, and an introduction passage 88 communicates with the internal space 87. The main body portion 80 forms a part of the inner wall surface that partitions the nozzle passage 83 and a part of the inner wall surface that partitions the internal space 87, and the lid portion 82 defines the remaining portion of the inner wall surface that partitions the nozzle passage 83 and the inner space 87. The remainder of the partitioning inner wall surface is formed.

At the time of application by the application nozzle, the coating material is pushed out from the introduction passage 88 through the internal space 87 to the introduction port 85 of the nozzle passage 83 and ejected radially from the outlet port 84. In that case, it becomes a film shape according to the shape of the nozzle passage 73, and adheres to the surface of an object (not shown) while spreading in a skirt shape.
JP-A-11-179243

  Although the above-mentioned patent document 1 does not mention the size (width) of the nozzle passage 83 of the application nozzle and the application target, it is considered that the nozzle passage 83 is quite narrow because it is “film-like”. As a result, it is difficult to properly discharge the skin material. For example, when the paint is a urethane raw material, the urethane raw material remaining in the nozzle at the end of discharge (injection) is cured. Therefore, it is necessary to wash away the remaining paint by passing a solvent such as thinner through the nozzle after each paint discharge.

  However, this requires equipment for supplying thinner and the use of flammable thinner is dangerous. If no solvent is used, a cleaning member (such as a brush) is brought into contact with the main body 80 and the inner wall of the lid 82 that define the nozzle passage 83 unless the screw 81 is removed to separate the main body 80 and the lid 82. I can't let you.

  This invention is made | formed in view of the said situation, and it aims at providing the application nozzle which can clean a nozzle formation surface easily, providing a slit-shaped nozzle with a narrow width | variety and a large area.

The basic technical idea of the present invention is that, among the application nozzles, a member that partitions the nozzle is pivotally supported with respect to the other parts and can be rotated, and the cleaning member can be brought into contact with the opened nozzle forming surface. There is.
(1) In the coating nozzle according to the first invention of the present application, as described in claim 1, the coating nozzle 40 mounted on the coating head 30 to which the coating material is supplied includes a flow hole 47 communicating with the coating head. A main body 45; a first base portion 52R having a first nozzle forming surface 51R; and a first arm portion 54R extending from the first base portion and pivotally supported by the main body. A first opening / closing member 50R; a second base portion having a second nozzle forming surface; and a second arm portion extending from the second base portion and pivotally supported by the main body. And a second opening / closing member occupying.

  In this application nozzle, when the first opening / closing member and the second opening / closing member occupy the nozzle forming position, the first nozzle forming surface and the second nozzle forming surface define the slit-like nozzle 60 communicating with the flow hole of the main body. When the first opening / closing member and the second opening / closing member occupy the nozzle opening position, the cleaning member 73 can contact the first nozzle forming surface and the second nozzle forming surface, respectively.

According to a second aspect of the present invention, in the first aspect, the first opening / closing member and the second opening / closing member have a symmetrical shape with respect to the nozzle. According to a third aspect of the present invention, there is provided a coating nozzle according to the second aspect, wherein the main body includes an annular portion 46R, a first extension portion 48R and a second extension portion extending radially outward from the annular portion, and the first and second extensions. First and second arm portions of the opening / closing member are pivotally supported by the extension portion. A coating nozzle according to a fourth aspect of the present invention is the coating nozzle according to the third aspect, wherein the first locking member 68R and the first locking member 68R for locking the first opening / closing member and the second opening / closing member to the nozzle opening position are respectively attached to the first extension portion and the second extension portion of the main body. Two locking means are arranged.
(2) According to a second aspect of the present invention, there is provided the application nozzle according to the fifth aspect, wherein the application nozzle attached to the application head to which the coating material is supplied includes a flow passage forming portion provided with a flow passage communicating with the application head. A body member including a nozzle forming portion having a first nozzle forming surface; an opening / closing member having a second nozzle forming surface, pivotally supported by the body member, and occupying a nozzle forming position or a nozzle opening position by rotation; Consists of.

  In this application nozzle, when the opening / closing member occupies the nozzle forming position, the second nozzle forming surface and the first nozzle forming surface partition the slit-shaped nozzle, and when the opening / closing member occupies the nozzle opening position, the cleaning member is The first nozzle formation surface and the second nozzle surface can be contacted.

  According to a sixth aspect of the present invention, in the fifth aspect, the nozzle forming portion of the main body member is fixed to the flow passage forming member. According to a seventh aspect of the present invention, in the fifth aspect, the nozzle forming portion of the main body member is pivotally supported by the flow passage forming member.

(1) According to the coating nozzle of the first invention, the first opening / closing member and the second opening / closing member at the nozzle forming position can be rotated to the nozzle opening position at the time of cleaning when the paint is discharged. The first nozzle formation surface and the second nozzle formation surface are largely opened at the nozzle opening position, and the whole is exposed. Therefore, a cleaning member such as a brush can be easily brought into contact with both nozzle formation surfaces, and the paint adhering to the surfaces and corners can be removed.

According to the application nozzle of the second aspect, since the first opening / closing member and the second opening / closing member are symmetrical with respect to the nozzle, the rotation to the nozzle forming position and the nozzle opening position is easy and reliable. According to the application nozzle of claim 3, since the main body includes the annular portion or the cylindrical portion and the first extension portion and the second extension portion, the flow passage 37 is formed and the first opening and closing member and the second opening and closing member are pivotally supported. Suitable for. According to the application nozzle of the fourth aspect, since the first opening / closing member and the second opening member are locked at the nozzle opening position, the nozzle forming surface can be easily cleaned.
(2) According to the application nozzle of the second aspect of the invention, the opening / closing member at the nozzle forming position can be rotated to the nozzle opening position at the time of cleaning. Since at least the second nozzle forming surface is opened at the nozzle opening position, the adhering paint can be removed by easily bringing a cleaning member such as a brush into contact therewith.

  According to the application nozzle of the sixth aspect, since the passage forming portion and the nozzle forming portion can be integrated, the structure of the main body member is simplified. According to the application nozzle of the seventh aspect, since the nozzle forming portion can rotate with respect to the flow path forming portion, the first nozzle forming surface and the second nozzle forming surface can be largely opened during cleaning.

<Resin products>
The application nozzle of the present invention applies a resin product having a multilayer structure, in particular, a coating for forming a skin layer (skin material). A typical resin product is an interior part of a vehicle, but is not limited thereto. For example, it has a three-layer structure including a base material, a foam layer laminated thereon, and a skin layer laminated thereon, and the foam layer connects the base material and the skin layer. However, it is also applied to resin products having a two-layer structure or a four-layer structure. The substrate is made of polypropylene or acrylonitrile, and the foam layer is made of urethane vinyl chloride or TPO.
<Formation of skin layer>
The skin layer is made of a soft resin material such as urethane, vinyl chloride, or TPO, and is formed by slush molding of the soft resin material.
<Application nozzle>
The application nozzle of the present invention may be composed of a main body and two opening / closing members (first invention), or may be composed of one opening / closing member of the main body member (second invention).
a. Main body, main body member The main body member in the case of one opening / closing member and the main body in the case of two opening / closing members are paint flow passage forming members in view of their functions. The main body has an annular portion or a cylindrical portion that defines the flow passage, and a pair of extensions that extend radially outward therefrom. The main body member has an annular flow passage forming portion and a nozzle forming portion having a first nozzle forming surface. The nozzle forming portion may be fixed to the flow passage forming portion so as not to rotate, or may be pivotally supported so as to be rotatable.
b. Opening / Closing Member One or two opening / closing members are nozzle forming and opening members in view of their functions. A base portion having a nozzle forming surface and an arm portion extending therefrom can be provided. In the first invention, the arm part of the opening / closing member and the extension part of the main body partially overlap, and are pivotally supported by this overlapping part. In the second aspect of the invention, the nozzle forming portion is pivotally supported by the flow passage forming portion so as to have the same configuration.
c. Formation of nozzle When there is one opening / closing member, this opening / closing member is pivotally supported by the main body member, and occupies a nozzle forming position or a nozzle opening position (cleaning allowable position) by rotation. The nozzle is partitioned by one surface of the nozzle forming portion of the main body member and one surface of the opening / closing member at the nozzle forming position.

  When there are two opening / closing members, both are pivotally supported by the main body and occupy a nozzle forming position and a nozzle opening position (cleaning allowable position). The first opening / closing member and the second opening / closing member can be symmetric with respect to the nozzle. The nozzle is defined by a first nozzle forming surface of the first opening / closing member and a second nozzle forming surface of the second opening / closing member.

In both the first and second inventions, the nozzle forming surface is a flat surface, and the width of the nozzle is uniform throughout. The opening edge of the opening / closing member or the flow passage forming member can be formed in an arc shape or the like.
d. Opening and closing of opening / closing member and cleaning of nozzle The coating nozzle of the present invention has a great feature in that an opening / closing member and the like partitioning the nozzle can be rotated for cleaning the nozzle forming surface. When there is one opening / closing member, the opening / closing member is rotated to the nozzle opening position with respect to the main body member during cleaning. The nozzle forming surface at the nozzle open position may be at a predetermined angle (acute angle, right angle or obtuse angle) so as to form a space in which the cleaning member can be inserted. In addition, if the nozzle formation part of a main body member rotates with respect to a flow path formation part, cleaning will become easier. When there are two opening / closing members, the angle formed by the first nozzle forming surface of the first opening / closing member and the second nozzle forming surface of the second opening / closing member may form a space in which the cleaning member can be inserted.

  An external force around the pivot is applied to the first and second opening / closing members by the opening / closing device to rotate the nozzle forming position to the nozzle opening position or vice versa. For rotation, the application nozzle may be brought closer to a fixed opening / closing device, or the opening / closing device may be moved closer to the fixed application nozzle. The opening / closing member rotated to the nozzle opening position is locked at that position by the main body or a locking mechanism disposed between the main body member and the opening / closing member.

Embodiments of the present invention will be described below with reference to the accompanying drawings. In this embodiment, the present invention is applied to a coating nozzle for forming the skin of an instrument panel having a three-layer structure.
(Constitution)
a. Instrument Panel and its Manufacturing As shown in part in FIG. 1, the instrument panel 10 includes a base material 12, a foam layer (cushion layer) 14, and a skin layer 16. As for the material, the base material 12 is polypropylene, the foamed layer 14, the foamed urethane, and the skin layer 16 is urethane.

The outline of the manufacturing method of the instrument panel 10 will be described based on FIG. A base material is applied to the core mold 20 having the convex portions 21 to form the convex base material 12 as a whole. In addition, you may attach the base material 12 prepared by another process to the convex part 21. FIG. In addition, the skin layer 16 is formed by applying a skin material to the mold 23 having the recess 24 from a coating nozzle 40 (see FIG. 3), which will be described later, attached to the tip of the coating head 30 (see FIG. 3). Next, the core mold 20 having the base material 12 formed on the outer surface thereof is fitted into the recess 24 having the skin layer 16 formed on the inner surface thereof, and an unfoamed layer material is injected into the gap between the two, Foam and solidify. Thus, the instrument panel 10 in which the base material 12 and the skin layer 16 are integrated by the foam layer 14 is completed.
b. Application nozzle Next, the application nozzle 40 for applying the skin material for forming the skin layer 16 will be described with reference to FIGS. 3, 4, and 5. 3 is a front view, FIG. 4 is a side view, and FIG. 5 is a bottom view.

  The application nozzle 40 includes a base 45 and a pair of opening / closing members 50L and 50R. The main body 45 includes a cylindrical portion 46 and a pair of bifurcated extensions 48L and 48R. The inner peripheral surface of the cylindrical portion 46 has a circular cross section, and the outer peripheral surface has a polygonal cross section. The flow hole 47 is coaxial with and communicates with a supply hole (not shown) of the coating head 30. The bifurcated extensions 48L and 48R extend outward slightly apart from a position opposite to the diameter of the outer peripheral surface of the cylindrical portion 46.

  Since the left opening / closing member 50L and the right opening / closing member 50R have a symmetrical shape, the following description will be focused on the right opening / closing portion 50R. Each part of the left opening / closing member 50L is left-opening / closing member 50R as required. R after the reference number of each part is changed to L and displayed.

  The right opening / closing member 50R includes a base portion 52R and a pair of arm portions 54R extending outward therefrom. The base 52R has a predetermined thickness and a lower end edge having an arc shape, and a flat inner surface 51R is a nozzle forming surface. The bifurcated extension 48R is sandwiched between the arms 54R from both sides, the shaft 56R penetrates these three members, and a nut is fixed to the tip. As a result, the right opening / closing member 50R can rotate (pivot) within a predetermined angle range around the shaft 56R with respect to the main body 45. The same applies to the left opening / closing member 50L.

  A locking bolt 62R is erected on one side surface of the base 52R of the right opening / closing member 50R, and when rotating from the nozzle forming position to the nozzle opening position and when rotating from the nozzle opening position to the nozzle forming position. An external force around the shaft 56R can be applied to the locking bolt 62R by the opening / closing bracket 71 of the opening / closing and cleaning device 70. As shown in FIG. 3, the opening / closing and cleaning device 70 is fixedly disposed, and has a pair of opening / closing fittings 71 and a rotating brush 73. When the coating head 30 and the coating nozzle 40 are moved to the cleaning position after the coating material is discharged, the opening / closing bracket 71 is locked to the locking bolt 62R and the rotating brush 73 can come into contact with the opened nozzle forming surface 51R and the like.

Further, a cylindrical portion 65R is formed in each of the bifurcated extensions 48R of the main body 45, and the ball 63 accommodated in the bottom thereof is an arm portion 54R of the right opening / closing member 50R by a spring 64R disposed behind it. The surface is pressed. The arm portion 54R is formed with a recess 66 at a predetermined position, and the ball 63 can be fitted into the recess 66 when the right opening / closing member 50R is rotated to the open position. The same applies to the left opening / closing member 50L.
(Function)
a. Formation of the nozzle 60 When the right opening / closing member 50R and the left opening / closing member 50L are respectively rotated to the nozzle forming position, the slit forming surface 51R of the base 52R and the slit forming surface 51L of the base 52L have a slight clearance. Opposite, slit-shaped nozzles 60 are defined. The nozzle 60 has a uniform predetermined width (0.25 to 1.5 mm) throughout, and the lower end opening has an arc shape.

The coating material (urethane raw material having a viscosity of 100 to 2000 cp) supplied from the coating head 30 flows through the flow hole 47 of the main body 45 and flows into the slit-like nozzle 60 partitioned by the first and second opening / closing members 50R and 50L. To do. The coating material is discharged from the openings of the first and second opening / closing members 50R and 50L in a direction perpendicular to the opening edge, and forms a fan-shaped spray (pattern) S in a side view, with a width determined by the width of the nozzle 60. By moving the coating nozzle 40 along the recess 24 of the mold 23, the skin layer 16 having a predetermined thickness and curved along the inner surface of the recess 24 is formed on the inner surface.
b. Cleaning of nozzle 60 When clogging or the like occurs in the nozzle 60 due to continuous application of the skin material, the nozzle forming surfaces 51R and 51L are cleaned. At the time of cleaning, the application nozzle 40 is moved closer to the opening / closing and cleaning device 70. Then, the open / close fitting 71 applies an external force in the tangential direction to the locking bolt 62R erected on the base 52R, the locking bolt 62L erected on the base 52L, and the like. As a result, the right opening / closing member 50R is rotated counterclockwise around the shaft 56R relative to the main body 45, and the left opening / closing member 50L is rotated clockwise around the shaft 56L, so that both nozzle forming surfaces 51R are positioned. A large obtuse angle is formed, and the right opening / closing member 50R reaches a nozzle opening position indicated by a two-dot chain line in FIG. The same applies to the left opening / closing member 50L.

In the nozzle open position, the ball 63R is fitted into the recess 66R, and the right opening / closing member 50R is held in that position. Further, the rotating brush 73 enters the open space and cleans the right nozzle forming surface 51R and the left nozzle forming surface 51L. After cleaning, the application nozzle 40 is separated from the opening / closing and cleaning device 70. Then, the right opening / closing member 50R is rotated in the clockwise direction and the left opening / closing member 50L is rotated in the counterclockwise direction by the engagement between the opening / closing metal fitting 71 and the locking bolt 62R.
(effect)
According to the application nozzle 40 of this embodiment, the following effects can be obtained. First, the application nozzle 40 is convenient for forming the skin layer 16 of the instrument panel 10. Since the skin layer 16 has a thin winding thickness, it is desirable that a thin film-like spray be ejected from the coating nozzle. In this respect, the coating nozzle 40 has a slit-like nozzle 60 with a small width, and is therefore suitable for ejecting a film-like spray. Moreover, since the fan-shaped shape of the spray ejected by the application nozzle 40 has a shape corresponding to the curved inner surface of the recess 24 of the mold 23, the film thickness of the skin layer 16 can be made uniform.

  Second, the application nozzle 40 is easy to clean the nozzle 60. When the paint is solidified in the nozzle 60, the opening / closing bracket 71 is locked to the locking bolt 62R, and the right opening / closing member 50R and the left opening / closing member 50L are rotated in a C shape. Accordingly, the rotating brush 73 can be brought into contact with the right nozzle forming surface 51R and the left nozzle forming surface 51R that are exposed downward and the paint on the nozzle forming surfaces 51R and 51L can be easily removed. There is no danger like using thinner, and it is safe.

  Third, when the nozzle 60 is cleaned, the left and right open / close members 50R and 50L are reliably held at the nozzle open position. When the left and right opening / closing members 50R and 50L are rotated to the open position, the ball 63R and the like are fitted into the recess 66R and the like of the arm portion 54R. The ball 63R or the like biased by the spring 64 is securely fitted into the recess 66R or the like, and returns to the nozzle formation position unexpectedly unless a predetermined external force is applied to both the opening and closing members 50R and 50L by the opening and closing device. Don't worry.

  Fourth, since the left and right opening and closing members 50R and 50L have a symmetrical shape with respect to the nozzle 60, the rotation to the nozzle forming position and the nozzle opening position is easy and reliable.

It is a partial cross section figure of the instrument panel containing the skin layer formed from the example (application nozzle) of the present invention. It is explanatory drawing which shows formation of the skin layer by a coating nozzle. It is a front view which shows the Example (coating nozzle) of this invention. It is a bottom view which shows the application nozzle of this invention. It is a side view which shows the coating nozzle of this invention. It is a front view of a prior art example. It is a bottom view similarly. It is sectional drawing similarly.

Explanation of symbols

10: Instrument panel 12: Base material 14: Foam layer 16: Front support layer 20: Core type 24: Cavity type 30: Application head 40: Application nozzle 45: Main body 46: Cylindrical part 47: Distribution hole 48R, 48L: Extension part 50R : First opening / closing member 50L: Second opening / closing member 52R: Base portion 54R: Arm portion 60: Nozzle 68R: Lock mechanism 70: Opening / closing and cleaning device 71: Opening / closing fitting 73: Brush

Claims (7)

An application nozzle attached to an application head to which paint is supplied,
A main body with a flow hole communicating with the coating head;
A first opening / closing member including a first base portion having a first nozzle forming surface and a first arm portion extending from the first base portion and pivotally supported by the main body, and occupying a nozzle forming position or a nozzle opening position by rotation. When,
A second opening / closing member including a second base portion having a second nozzle forming surface and a second arm portion extending from the second base portion and pivotally supported by the main body, and occupying a nozzle forming position or a nozzle opening position by rotation. And consists of
When the first opening / closing member and the second opening / closing member occupy the nozzle forming position, the first nozzle forming surface and the second nozzle forming surface define slit-like nozzles communicating with the flow holes of the main body. And
An application nozzle, wherein a cleaning member can contact the first nozzle forming surface and the second nozzle forming surface when the first opening / closing member and the second opening / closing member occupy the nozzle opening position, respectively. .   The coating nozzle according to claim 1, wherein the first opening / closing member and the second opening / closing member have a symmetrical shape with respect to the nozzle.   The main body includes an annular portion, and a first extension portion and a second extension portion extending radially outward from the annular portion, and the first and second arm portions are provided on the first and second extension portions, respectively. The coating nozzle according to claim 2, wherein   First locking means and second locking means for locking the first opening / closing member and the second opening / closing member to the nozzle opening position are disposed on the first extension part and the second extension part of the main body, respectively. The coating nozzle according to claim 3. An application nozzle attached to an application head to which paint is supplied,
A main body member including a flow passage forming portion provided with a flow passage communicating with the coating head, and a nozzle forming portion provided with a first nozzle forming surface;
An opening / closing member provided with a second nozzle forming surface, pivotally supported by the body member, and occupying a nozzle forming position or a nozzle opening position by rotation;
When the opening / closing member occupies the nozzle forming position, the second nozzle forming surface and the first nozzle forming surface define a slit-like nozzle, and when the opening / closing member occupies the nozzle opening position, the cleaning member 1 nozzle forming surface and the second nozzle surface can be contacted,
An application nozzle characterized by that.   The coating nozzle according to claim 5, wherein the nozzle forming portion of the main body member is fixed to the flow passage forming portion.   The coating nozzle according to claim 5, wherein the nozzle forming portion of the main body member is pivotally supported by the flow passage forming portion.

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