JPS60145220A - Manufacture of molding - Google Patents

Abstract

PURPOSE:To obtain a molding having excellent appearance by sticking a protecting tape larger in size than a non-coating surface, on a metallic strip before roll forming the strip, and providing notches corresponding to the non-coating surface to the protecting tape at the time of straightening a profile shape and stripping off an excess protecting tape before providing a coating to the strip. CONSTITUTION:A protecting tape 6 excellent in heat resistance is stucked onto a metallic tape 5 to the width larger than the width W of a non-coating surface, and then the strip 5 is formed into a profile shape 9 by a roll-forming machine 8. The shape 9 is successively inserted through a through-hole 15 formed in a setting die 10a of a straightening device 10, and the die 10a is rotationally displaced around the axial line of shape 9 to hold it by a holder 10b. The shape 9 is passed through the hole 15 in this state, to straighten its warp and torsion, etc. as well as to form notches 6c in the tape 6. Next, the shape 9 with formed notches 6c is cut into a prescribed cross section, and then a protruded excess part 6b of the tape 6 is stripped off to form a colored part 3 by coating its whole surface. Then the tape 6 is stripped off, and then the non-coating surface of shape 9 is exposed, to obtain a mold 1 having the colored part 3.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field of the Invention) The present invention relates to a method of manufacturing a metal molding having a colored portion.

[Prior art]

2. Description of the Related Art Moldings for vehicles are made of roll-molded metal products and have a colored portion on a portion thereof. Fig. 1 is a front view of a side window molding for a vehicle, Fig. 2 is a sectional view taken along the line A-A, Fig. 3 is a system diagram showing the molding manufacturing equipment, Fig. 4 is a sectional view taken along the line B-B, and Fig. 5 is a sectional view taken along the line A-A. The figure is a perspective view showing the painted state, and FIG. 6 shows a malfunction M is a triangular shape formed from a long molding l made of a roll-formed product and a connector 2 made of a press-formed product that connects this molding 1 into a frame shape. It is formed into a frame shape, and a colored portion 3 is formed by painting on the inner circumferential side over the entire circumference.

The molding 1 is integrally formed with a planar inner peripheral part 1a, an outer peripheral part 1b-1 bent from the inner peripheral part 1a, and a groove 1c for holding glass formed inside the inner peripheral part 1a. A colored portion 3 is formed on the entire inner peripheral portion 1a.

The molding manufacturing apparatus includes an uncoiler 4, an adhering roll 7 for adhering a protective tape 6 to a metal strip 5 sent out from the uncoiler 4, a roll forming machine 8 for roll-forming the metal strip 5 after adhering the protective tape 6, a correction device 10 for correcting deformation of a roll-formed profiled material 9;
The straightening device 10 includes a cutting device 11 for cutting the straightened profiled material 9, and a coating device 12, and the straightening device 10 has a straightening die 10a held in a holder 10b so as to be rotatable and deflectable about the axis of the shaped material 9. .

As shown in FIG. 3, the conventional method for manufacturing the molding 1 is to send out a metal strip 5 from an uncoiler 4,
On one side of the non-painted outer peripheral part 1b, a protective tape 6 made of synthetic resin with a width W and with adhesive on one side is overlaid.
After pasting with a pasting roll 7, cold roll forming is performed with a roll forming machine 8 to form a profiled material 9 having a predetermined cross-sectional shape as shown in FIG. Subsequently, it is passed through the straightening die 10a of the straightening device 10 to correct deformations such as bending and twisting, and then cut to a predetermined size by the cutting device 11, degreased and cleaned, and then spray-painted by the coating device 12 as shown in FIG. After that, if necessary, perform baking and apply protective tape 6.
When peeled off, the unpainted surface of the profiled member 9 is exposed at the outer circumferential portion 1b, and a molding 1 is obtained in which the colored portion 3 is formed only at the inner circumferential portion la.

However, in the conventional manufacturing method as described above, the sixth
As shown in the figure, when the end 6a of the protective tape 6 is located at the bending part of the molding 1, it tends to partially peel off during roll forming, and the peeling further expands due to penetration of lubricating oil, so when painting There was a problem in that the paint penetrated into the peeled part and the parting line of the colored part 3 became disordered and unclear, impairing the appearance.

[Purpose of the invention]

This invention is intended to improve the above-mentioned problems.A protective tape with a width larger than the non-painted surface is applied to a metal strip and roll-formed. By making cuts corresponding to the surface, peeling off the excess protective tape, and then painting, it is possible to form a clearly colored part at the parting line, and manufacture a molding that can obtain a molding with an excellent appearance. The purpose is to propose a method.

[Structure of the invention]

This invention involves a process of attaching a protective tape with a width larger than the non-painted surface to the surface of a metal strip, a process of roll-forming the metal strip bound with the protective tape into a predetermined cross-sectional shape, and At the time of straightening, a step of forming a cut corresponding to the width of the non-painted surface in the protective tape, a step of cutting the cut shape into a predetermined size, and a step of cutting the cut shape into a predetermined size, leaving the protective tape of the non-painted surface from the cut shape. This method of manufacturing a molding includes a step of peeling off the protective tape, a step of painting the protective tape and forming a colored part, and a step of peeling off the remaining protective tape to expose the unpainted part.

[Embodiments of the invention]

Hereinafter, this invention will be explained with reference to examples. 7 to 11 show one embodiment of the present invention, and FIG. 7 shows a third embodiment of the present invention.
Figure 8 is a plan view of the straightening die with plate 7 removed, Figure 9 is a cross-sectional view of CC, and Figures 10 and 11 are perspective views of the deformed material being manufactured. 2, the same reference numerals as in FIGS. 1 to 6 indicate the same or corresponding parts.

The manufacturing equipment used to manufacture the molding 1 is basically the same as that shown in FIG.
The straightening die 10a rotatably held in the eighth
As shown in FIG. 9, an insertion hole 15 through which the irregularly shaped material 9 can pass is formed at the joint between the vertically divided approximately prismatic dies 13 and 14. It has become. A recess 16 is formed approximately in the center of the die 13, and a rectangular perforation 17 is formed approximately in the center of the bottom of the recess 16, and a recess 18 is also formed in the die 14 at a position corresponding to the perforation 17. has been done. In the fourth part 16,
A rectangular cylinder 19 having a length approximately equal to the longitudinal dimension and a width slightly smaller than the width is inserted into the bottom of the cylinder 19.
A perforation 20 is provided at a position corresponding to 7. Cylinder 19 adjustment screw 21. ,．． 22 allows movement adjustment in the width direction within the recess 16, and a perforation 20 is provided inside.
．． 17 and a spring 27 held by an upper plate 26, which holds a rotary blade 23 rotatably by a shaft 24, which has a cutting edge protruding toward the recess 18 side.
It is urged toward the perforation 20 side by. The depth of the recess 18 is such that the tip of the rotary blade 23 does not come into contact with the die 14 when the profiled material 9 is not present.

The manufacturing method of the molding 1 is as shown in FIG.
Basically, it is the same as before, but the protective tape 6 attached to the metal strip 5 is highly heat resistant and has a width of W + α larger than the width W of the non-painted surface.
This is pasted on the metal strip 5 in a state that it protrudes from the non-painted surface.

Note that the value of α is desirably set so that the end of the protective tape 6 is located in the unbent portion of the molding 1. When roll forming is performed using the roll forming machine 8 in this state, some peeling occurs at the edges of the protective tape 6 of the resulting profiled material 9, but this occurs from the non-coated area as shown in FIG. It is limited to the protruding portion 6b having the protruding width α.

Subsequently, the deformed material 9 is inserted into the insertion hole 15 formed in the straightening die 10a of the straightening device 10, and the straightening die 10a is rotated around the axis of the deformed material 9 and held in the holder 10b. By passing the shaped material 9, deformations such as bending and twisting of the shaped material 9 are corrected, but at this time, the rotary blade 23 is pressed by the spring 27 against the boundary between the painted surface and the non-painted surface of the shaped material 9. Since the rotary blade 23 rotates around the shaft 24 as the profiled material 9 passes, a cut 6c is formed in the protective tape 6 of the profiled material 9.

The position of the cut 6c is adjusted by moving the cylinder 19 in the width direction by adjusting the adjustment screws 21 and 22. The cuts 6C are formed by pressing the rotary blade 23 while the profiled material 9 is firmly held by the die 13.14 and straightened, so even if the profiled material 9 is bent, twisted, or otherwise deformed, it will not meander or twist. There are no uncut areas, and - it is clearly formed in a straight line.

When the irregularly shaped member 9 is not present in the insertion hole 15, the recess 18 becomes a relief part, and the rotary blade 23 is prevented from being damaged.

After cutting the profiled material 9 with the cuts 6c into a predetermined cross section using the cutting device 11, the excess protruding portion 6b of the protective tape 6 is peeled off, as shown in FIG. As shown in the figure, when the entire surface is painted to form a colored part 3 as in the conventional method, and the protective tape 6 is peeled off by baking if necessary, the non-painted surface of the profiled material 9 is exposed and has a colored part 3. Molding 1 is completed. Since the cut line formed in the protective tape 6 is clear and straight, the parting line of the colored part 3 is clear and straight, and a molding with excellent appearance can be obtained.

In the above description, the configuration of the molding 1 manufacturing apparatus and the straightening die 10a, and the molding 1
The shape, structure, etc. of the colored portion 3 can be changed.

〔Effect of the invention〕

According to the present invention, a protective tape with a width larger than the non-painted surface is attached to a metal strip and roll-formed, and when straightening the deformed material, cuts are made in the protective tape corresponding to the non-painted surface, and the excess protective tape is removed. After peeling off, a clear cut line is formed in the area, and the excess protective tape that has peeled off can be peeled off and painted. can produce excellent moldings. Particularly when forming a parting line at the folded part of the molding, positioning the edge of the protective tape at the folded part will cause
The protective tape tends to peel off due to the expansion and contraction of the material due to roll forming, but in the present invention, the ends of the protective tape are positioned avoiding such bends, so even if a parting line is formed at the bend, A clear parting line can be formed along the bent portion.

[Brief explanation of the drawing]

Fig. 1 is a front view of a side window molding for a vehicle, Fig. 2 is a sectional view taken along the line A-A, Fig. 3 is a system diagram showing the molding manufacturing equipment, Fig. 4 is a sectional view taken along the line B-B, and Fig. 5 is a sectional view taken along the line A-A. The figure is a perspective view showing the painted state, Figure 6 is a perspective view of the molding showing the state where a problem has occurred, and Figures 7 to 1.
Figure 1 shows an embodiment of the present invention, and Figure 7 shows B in Figure 3.
-B sectional view, and FIG. 8 is a plan view with the upper plate of the straightening die removed. In each figure, the same reference numerals indicate the same or equivalent parts, 1 is the molding, 3 is the colored part, 5 is the metal strip, 6 is the storage tape, 8 is the roll forming machine, 9 is the profiled material, 10 is the straightening device, 10a is a straightening die, 15 is a through hole, 16.18
19 is a cylinder, 23 is a rotary blade, and 27 is a spring. Figure 4 5 Figure 6 Figure 5 Figure 7

Claims (3)

[Claims] (1) A process of attaching a protective tape with a width larger than the non-painted surface to the surface of the metal strip, a process of roll-forming the metal strip with the protective tape attached to a predetermined cross-sectional shape,
A process of forming a cut in the protective tape corresponding to the width of the non-painted surface when straightening the formed profiled material, a step of cutting the profiled material with the cut into a predetermined size, and a step of cutting the non-painted surface from the cut profiled material. Manufacture of molding including the process of peeling off the excess protective tape leaving behind the protective tape, the process of painting including the protective tape to form a colored part, and the process of peeling off the remaining protective tape to expose the unpainted part. Method. (2) The manufacturing method according to claim 1, wherein the cuts are formed while the profiled material passes through a straightening die. (3) The manufacturing method according to claim 1 or 2, wherein the cuts are formed by a cutting blade provided on a straightening die.