JPS60251952A - Masking jig used in painting - Google Patents

Abstract

PURPOSE:To perform certain fixation of a masking jig by preventing the detachment of the jig caused by wind pressure at the spraying time of a paint, by forming the jig from the string part for forming the parting line of a paint and a film part for covering a non-painting part and providing the hooking member applied to the other member to the side part of the film part. CONSTITUTION:The string part 2 of a masking jig 1 is inserted into the groove G of an article W to be painted and inlaid with the groove G in a crushed state. Next, the surface of the part M to be painted of the article W to be painted is covered with the film part 3 secured to the string part 2 and the side part 3a of the film part 3 in the side opposite to the string part 2 is involved in the rear surface side of the article W to be painted and the hooking member 3b provided to said side part 3a is hooked with the hook 12a provided to a receiver 12 to perform the spraying of the paint by a painting gun and the baking thereof.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a masking jig for painting used when painting only a portion of the back of an object to be painted, and in particular to a masking jig for painting only a part of the back side of an object to be painted. It is a useful jig when painting.

(Prior art) When painting only a part of the surface of various products such as metal or resin, or when applying multiple types of coatings with different colors to the surface of these products, it is necessary to paint the object to be coated during the painting process. It is necessary to expose only a portion of the painted portion and cover the other unpainted portion.

Conventionally, in order to coat the non-painted parts of the object to be coated, in order to obtain a boundary line between the surface of the non-painted part and the surface of the part to be painted, that is, a parting line, the operator manually removed the unpainted part of the part to be coated. Adhesive tape was pasted to the area close to the painted area to form a parting line, and the masking material covering the non-painted area was fixed to the object to be coated using the adhesive tape.

In this way, masking work was performed by applying tape to the object to be coated and forming J-shaped parting lines on the tape, but the work had to be done carefully to obtain accurate parting lines. Moreover, there was a problem in that it was difficult to work with and was not practical for painting mass-produced products.

For this reason, a coating that has a set part that is attached to the non-painted part of the object to be painted (pulled) and forms a parting line for the paint applied to the surface of the part to be painted, and a membrane part that is fixed to this and covers the non-painted part. The applicant has proposed a masking jig for

When this masking jig for painting is attached to an object to be coated and painted, in order to prevent the masking jig from coming off from the object to be coated, the membrane part of the masking jig and the object to be coated are connected with adhesive tape. It's stuck. However, when adhesive tape is used to fix the film part and the object to be coated, it is necessary to apply the adhesive tape to the object to be coated, to peel off the adhesive tape after painting, and to remove the adhesive remaining on the object to be coated using a solvent. The masking work for painting was extremely complicated.

(Purpose of the Invention) The present invention was made in order to eliminate such inconveniences, and can be easily and quickly attached to the object to be coated, and also It is possible to accurately form a parting line without making a boundary with the surface of the paint, and masking is required to prevent it from coming off the jig or the object to be coated due to the wind pressure during spraying or the wind pressure of warm air during baking of the paint. It is an object of the present invention to securely fix a jig so as to securely hold the masking jig, and to simplify masking work using the masking jig.

(Structure of the Invention) In order to achieve two objects, the present invention places an object to be coated having a non-painted part and a to-be-painted part directly above a receiver, A painting masking jig used when painting a painted part includes a set part that forms a parting line for the paint applied to the surface of the part to be painted, and a film part that is fixed to the set part and covers the non-painted part. This masking jig for coating is characterized in that it is provided with a hooking member provided on the side of the membrane portion and hooked onto other members.

(Example) Hereinafter, a masking jig for painting according to the present invention will be explained based on the drawings.

Figure 1 shows an example of an automobile bumper □ as an object to be coated. Modern car bumpers are now mainly made of synthetic resin, which is more elastic than metal and absorbs shock, in order to improve the protection function of the car body in the event of a collision and increase the degree of freedom in shaping. The automobile bumper shown in FIG. 1 is molded from synthetic resin.

The automobile bumper W shown in FIG. 1 has a groove G formed along the longitudinal direction in the central part of its surface.
Only the lower side is painted, or the upper and lower sides are painted with separate paints of different colors.

FIG. 2 is a diagram showing a masking jig 1 used when painting only the lower part C of the object W shown in FIG. It is.

The masking jig 1 for painting has a solid cross section that forms a parting line of the paint applied to the surface of a portion C of the object W to be painted, with an automobile bumper shown in FIG. 1 as an object W to be painted. A circular assembly part 2, a membrane part 3 fixed to the assembly part 2 and covering the non-painted part M, and a ring-shaped hanging member 3b fixed to the side part 3a of the membrane part 3 and hung on a hook or the like. has. The assembly portion 2, the membrane portion 3, and the hanging member 3b are fixed to each other by adhesive or heat fusion.

Assembly part 2 and membrane part 3 of the masking jig 1 for painting shown in Fig. 2
, and the hanging member 31), it is possible to use rubber mixtures or synthetic resin mixtures such as natural rubber, polyurethane, polyvinyl chloride, and polyX [dylene].
Further, as the material for the membrane portion 3, it is also possible to use aluminum foil or a rubber mixture or synthetic resin mixture coated with aluminum powder on the surface. And the object to be coated W
is a plastic automobile bumper, and when the material and 1) are a polymer with a non-polar molecular structure such as a polypropylene mixture as the base material, masking jig 1 for painting is used. Any material may be used. However, when masking an automobile bumper that is based on a polymer with a polar molecular structure such as polyurethane, nylon, or polybutylene J-phthalate, it is necessary to use a polymer with a polar molecular structure such as a soft polyvinyl chloride blend. It is better not to use materials containing plasticizers as the masking jig 1. This is because when the paint dries, the polar plasticizer contained in the material of the masking jig 1 migrates into the material of the automobile bumper, which is the object to be painted, the bumper W.
This is because the surface may be attacked. Therefore, when masking an automobile bumper W containing such a material.

It is desirable to use, as the masking jig 1, a material that does not contain a plasticizer and has a polar molecular structure, such as poly-1-dylene or polypropylene.

Next, a method of masking for painting will be described in which the masking jig 1 for painting is attached to the object W shown in FIG. 1 to cover the non-painted portion M of the object W to be painted.

As mentioned above, the masking jig 1 shown in FIG. 2 uses, for example, an automobile bumper as shown in FIG. This is to treat this part as the part C to be painted. First, a workpiece W to be coated, as shown in FIG. 1, is placed on the receiver 12 of the movable cart 11, which is movable by wheels 11a. A detailed cross-sectional view of the object W to be coated at this time is shown in FIG.

Next, as shown in FIG. 5, the assembled portion 2 of the masking jig 1 shown in FIG. 2 is inserted into the groove G of the object W to be coated. At this time, the operator crushes the assembled portion 2 with his or her fingers or presses a jig having a roller or the like against the string 8112 so that the assembled portion 2 fits into the groove G. conduct.

Next, as shown in FIG. 6, the membrane part 3 fixed to the assembled part 2 covers the surface of the non-coated part M of the object W, and the membrane part 3 is attached to the assembled part 2. The side part 3a on the opposite side is wrapped around the back side of the object W to be coated, and the hanging member 31 provided on the side part 3a is attached to the hook 12a which is attached to the hook 12. do.

Next, the movable trolley 11 is transported into a painting booth (not shown) in the state shown in FIG. Even if wind hits the masking jig 1 for painting during these operations, the 1st section 3b of the masking jig 1 for painting will not be in contact with the hook 12a of the receiving tool 12.
Since the masking jig for painting is
(When the masking jig 1 for painting is taken out from the object W to be painted after the paint has dried, there is a gap between the surface C to be painted and the non-painted surface M on the surface of the object W to be painted by the assembly part 2.) A line will be formed accurately and neatly at a position indicated by the symbol P in FIG.

In addition, in the embodiment shown in above), simply inserting the assembly part 2 of the masking jig 1 into the groove G of the object W to be coated fixes the assembly part 2 of the masking jig 1 and the object W to be coated. However, the present invention is not limited to this in any way, and the following embodiments can be considered.

That is, as shown in FIG. 7, the masking jig 1
The adhesive 6 may be applied and placed in the groove G before inserting the assembled part 2 into the groove Q of the object W to be coated. Further, as shown in FIG. 8, after inserting the assembled part 2 of the masking jig 1 into the groove G of the object W to be coated, apply adhesive from above the assembled part 2 to the non-coated area M side near the groove G. 6 along the longitudinal direction of the assembled portion 2, and
The cord part 2 and the object W to be coated may be attached with adhesive. After that, similarly to the embodiment described above, as shown in FIG. anti-λ・j for all 2
The side part 3a is wrapped around the back side of the object W to be coated, and the hanging member 31) provided on the side part 3a is attached to the hook 12a of the receiver 12.

In the case of such an embodiment, the detail 2 of the masking jig 1 and the object W to be coated are more securely fixed, which is more convenient.

The adhesive 6 is typically made of three types: rubber, acrylic polymer, or ethylene vinyl acetate polymer (EVAC). In this case, rubbers are suitable. Rubber adhesives 6 include polyisoprene filled with clay, etc., but the paint is baked in a hot air drying oven (-j-L).
), it is desirable to remove the masking jig 1 for painting from the object W to be painted so that no adhesive 6 remains on the surface of the object W to be painted. In this case, it is preferable to use a mixture containing a crosslinking agent composition as the adhesive 6. Crosslinking agent compositions include crosslinking reactive polymers such as polyisoprene and natural rubber, and tetramethylthiuram disulfide (TMT>
, crosslinking agents such as sulfur can be used.

Furthermore, as another embodiment of the present invention, a coating masking jig 1 is used in which a string-shaped bow member 3b is heat-sealed to the side part 3a of the membrane part 3 at a predetermined interval as shown in FIG. The same masking work as in the above embodiment may also be performed. Alternatively, as shown in FIG. 10, the masking work may be performed using a painting masking jig 1 in which cutouts 3C are provided at predetermined intervals on the side portion 3a of the membrane portion 3 to form a hanging portion @3b. Even when these masking jigs 1 for painting are used, it is possible to perform the same masking work as in the above embodiment.

Further, in the above-described embodiment, masking was performed using the assembled portion 2 of the painting masking jig 1 having a solid circular cross-sectional shape, but the present invention is not limited to this in any way. A masking jig 1 for use may be used, which has a set part 2 having a cross-sectional shape of a scale. Examples of the cross-sectional shape of the set part 2 of this painting masking jig 1 are as follows.

As shown in FIG. 11(A), the main body part 4 of the assembled part 2 is formed to have a substantially triangular cross section, and a triangular recess 5 is formed therein so that the assembled part 2 can be easily elasticized in the lateral direction. It may also be made deformable. Further, as shown in FIG. 11(B), the recess 5 formed in the main body 4 may be circular, or
The main body part 4 can be made into a deformed round shape as shown in C), the main body part 4 can be made into a square shape and the recessed part 5 can be made into a square shape as shown in the same figure (D>), or the main body part 4 can be made into a rectangular shape as shown in the same figure (E). The main body part 4 has a combination shape of a circle and a square, and a concave part 5 of a shape corresponding to this shape is formed.
Alternatively, as shown in Figure (F), the main body part 4 may be made into a combination of a circle and a triangle, or as shown in Figure (G), the main body part 4 and the fourth part 5 may be made into a triangular and square shape, respectively. They can be combined, or they can be made into various shapes, such as the outer periphery of the main body part 4 being approximately elliptical and the four parts having a daruma shape, as shown in FIG. 4(H). In this way, by making the main body part 4 and the recessed part 5 have various shapes, the assembled part 2 can be easily made elastically deformable.

Incidentally, in FIG. 11, the imaginary line shows the assembled portion 2 in a state before it is fitted into the groove G.

Painting masking jig 1 shown in Figures 12 (A) to (E)
12A and 12B are diagrams each showing a case where the assembled portion 2 is formed by a main body portion 4 and a hollow hole 10, and the shape of the hollow hole 10 is circular as shown in FIG. 12 (A>(B) and (E)). The hollow hole 10 can be made into a rectangular shape as shown in FIG. Or circular,
It is possible to have a triangular shape as shown in the figure (C) or a quadrilateral shape as shown in the figure (C). Furthermore, the shapes of the main body 4 and the hollow hole 10 are as shown in FIGS.
) It is possible to take various shapes as shown in FIG. In this way, the shape of the hollow hole 10 and the shape of the main body part 4 can be made into various shapes, and the assembly part 9 can be elastically closed.

13(A) to (1) are diagrams showing the shapes of the assembled portions 2 of another masking jig 1 for painting, and the assembled portions 2 are respectively protruded from the main body portion 4 and the outer surface of the main body portion 4 in the longitudinal direction. It is formed by a protrusion 7 extending along.

The assembled part 2 shown in FIG. 13(A) has a roughly rectangular main body part and a tapered protrusion part rising from the opposite side of the main body part 4 with respect to the membrane part 3. This protrusion 7 is inclined with respect to the surface 8 at an angle of θ. 1st
The assembly 2 shown in FIG. 3(B) has protrusions 7 formed on both sides of the main body 4, and each protrusion 7 is inclined at an inclination angle θ. The assembled portion 2 shown in FIG. 13(C) has a main body portion 4 formed in a V-shape, and by forming protrusions 7 on each of the main body portions 4t, the assembled portion 2 can be made into a W-shape as a whole. be. The assembled portion 2 shown in FIG. 13 has a protrusion 7 formed on one side of the main body 1 formed into a substantially rectangular shape, and the assembled portion 2 shown in FIG. 13(E) has protrusions on both sides of the rectangular main body. A portion 7 is formed respectively. Also, the 13th
The one shown in Figure (F) has a protrusion 7 with a V-shaped cross section formed on the main body 4 of the assembled part 2, and the V-shaped protrusion 7 can also be formed on both sides of the main body 4. It is possible.

Furthermore, the assembly part 2 shown in FIG. 13(G) has a recess 5 in the main body part 4.
, and a protrusion 7 is also formed. Further, as shown in FIG. 13(H), the protrusion 7 may be formed by making the cross-sectional shape of the assembled portion 2 star-shaped.
As shown in Figure (I), a large number of protrusions 7 may be formed by providing arc-shaped recesses on the outer circumferential surface of the assembled portion 2.

In addition, in FIGS. 12 and 13, the state before the assembled portion 2 is fitted into the groove G is shown by imaginary lines. Furthermore, it is also possible to form the assembled portion 2 into a shape in which any one of the recess 5, the hollow hole 6, and the protrusion 7 is combined. The shape of the rough portion 2 is the groove G
It is determined from what is shown in FIGS. 11-13 by taking into consideration various conditions such as the position of the parting line formed in FIG.

FIGS. 14(A) to 14(E) are diagrams showing still another masking jig 1 for li, in which the automobile bumper shown in FIG. 14(A) is used as the object W to be coated, and the grooves G formed therein are The m-wear masking jig 1 is used to paint only the lower side. The painting masking jig 1 is basically the second
Although it is similar to the one shown in the figure, a large number of slits 9 are formed in the part of the assembled part 2 that corresponds to the corner Q of the object W to be coated and is bent when the assembled part 2 is folded several times to tm G. It is. The shape of the slit 9 may be a thin cut as shown in Figure 14 (C), a wide cut as shown in Figure 14 (D), or a thin and intersecting cut. It is possible to do so. To this,
The assembled portion 2 follows the corner Q of the object W to be coated and is easily bent.

Further, in the above embodiment, the assembled portion 2 of the painting masking jig 1 is inserted into the groove G of the object W to be coated, but the present invention is not limited to this in any way. Figure (△
) As shown in FIG. In addition, masking of the object W to be coated is performed in the same manner as in the above embodiment.However, as shown in FIGS. An adhesive 6 is required to fix the assembled part 2 of the masking jig 1 to the part.

(Effects of the Invention) As described above, according to the present invention, an object to be painted having a non-painted part and a to-be-painted part is placed on a receiver, and the part to be painted of the object to be painted is painted. In the painting masking jig used when painting, there is a set part that forms a parting line for the paint to be applied to the surface of the part to be painted, a film part that is fixed to the set part and covers the non-painted part, and a part of the film part that covers the non-painted part. Since a hanging member is provided on the side and can be hung on other parts, the painting masking jig can be easily and quickly attached to the object to be coated, and it is also possible to easily and quickly attach the painting masking jig to the object to be coated. During spraying or baking, the masking jig does not come off the object to be coated, and by working together with the adhesive, clear and sharp parting lines are formed by the assembled parts, allowing smooth painting work. Furthermore, it has the excellent effect of simplifying the masking work of the masking jig for painting.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an automobile bumper as an object to be coated;
FIG. 2 is a perspective view showing a masking jig for painting according to the present invention, FIG. 3 is a perspective view showing the object to be coated shown in FIG. 1 attached to a moving cart, and FIG. FIG. 5.6, a cross-sectional view taken along line If-IV, shows one step according to the present invention.
Fig. 7.8 is a sectional view of the main part showing another embodiment of the present invention, and Fig. 9.10 is a masking jig for painting according to another embodiment of the present invention. A perspective view showing
11, Figures (A) to (H), Figure 12 (△) to (E),
13(A) to (1) are sectional views of main parts of a masking jig for painting used in the present invention, and FIG. 14 (A> is an automobile bumper as a workpiece according to another embodiment of the present invention) 14(B) is a cross-sectional view of FIG. 14(A),
Figures 14 (C) to ([) are perspective views showing the main parts of the painting masking jig to be attached to the bumper shown in Figure (A), and Figures 15 (A> and (B) are It is a main part sectional view of the masking jig for painting concerning other examples. 1... Masking jig for painting, 2... Assembly part, 3a.
...Side part, 3...Membrane part, 4...Body part, 6...Adhesive 7...Protrusion part, 12...Bracket, W...Object to be coated, M... ...Unpainted part, C...Painted part, G...Groove. Patent applicant: Nissan Motor Co., Ltd. Figure 1, Figure 1 (A) (E3>(c> (D) (E) (F) (G) CH) Figure 12 (A) (E3) (C) ( D) (En No. 13 (1 (A) (B) (Cn (D) (E) (F) (G) (H) (I) No. (A) 6 Figure 15 (B) 6

Claims (1)

[Claims] In a masking jig for painting, which is placed directly above an object to be coated having a non-painted part and a to-be-painted part, and is used when painting the part to be painted of the object to be painted, the part to be painted is a set part that forms a parting line for the paint applied to the surface of the set, a film part fixed to the set part and covering the non-painted part, and a hanging member provided on the side of the film part and hung on other members. A masking jig for painting, characterized by comprising: