JP3022021B2 - Screen printing method for resin products - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a warped resin product,
In particular, the present invention relates to a screen printing method for a resin product used for an automobile or the like.

[0002]

2. Description of the Related Art At present, interior and exterior resin products having a large number of warps are attached to automobiles and the like. One of the resin products is, for example, a rear garnish. As shown in FIG. 12, the rear garnish 30 is attached to a rear portion 33 of a body 32 of an automobile 31. Characters and patterns as decorations are printed on the surface of the rear garnish 30 by a screen printing machine.

Generally, screen printing is performed on the rear garnish 30 as follows. That is, as shown in FIG. 11, the rear garnish 3 is placed on a receiving jig 34 constituting a part of a screen printing machine (not shown).
0 is fixed, and a screen plate 35 constituting a part of the screen printing machine is arranged close to the upper part of the rear garnish 30 at a predetermined interval. The screen plate 35 has a screen 37 stretched in a plate frame 36. Then, a squeegee 38 constituting a part of the screen printing machine is applied to the screen 37, and is slid in the printing direction while applying a pressure while maintaining a predetermined angle, so that the screen 3 is moved.
7 is transferred to the rear garnish 30.

[0004]

However, the error between the distance a between the top 39 of the rear garnish 30 fixed to the receiving jig 34 and the screen 37 and the distance b between the printing end 40 and the screen 37 is predetermined. If the value is exceeded,
That is, when the rear garnish 30 is warped more than a predetermined amount with its longitudinal center at the top, the squeegee 3
Even if pressure is applied to the screen 37 toward the rear garnish 30 by 5, the screen 37 is not in contact with the rear garnish 30 because the screen 37 is under tension. For this reason, printing may not be performed, or a part of the printing may be blurred or blurred. Accordingly, in order to keep the difference between the distances a and b within a predetermined value, the screen plate 35 must be inclined and arranged close to the rear garnish 30 along the curve of the rear garnish 30 and partial printing must be repeated. However, there has been a problem that the number of printing operations is increased.

Therefore, it is conceivable to lower the tension of the screen 37 or to change the material of the screen 37 so that the screen 37 can be easily extended and to make contact with the rear garnish 30. There has been a problem that the garnish 30 comes into contact and printing is poor.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a screen printing method for a resin product, which is capable of reducing the number of screen printing steps of a warped printing substrate made of a synthetic resin. Is to provide.

[0007]

In order to achieve the above object, a printing medium made of synthetic resin having a warp with respect to a receiving jig.
And a locking portion formed on the receiving jig.
By engaging the groove, the receiving jig K
The gist of the present invention is to hold a printing medium against warpage, and to screen-print a screen plate on the printing medium with the screen placed close to the printing medium in this holding state.

[0008]

In the state where the printing plate is deformed and held against the warp of the printing medium in the receiving jig, printing is performed by disposing the screen of the screen plate in close proximity. For this reason, the number of times of printing of the screen plate is reduced by deforming the printing medium in accordance with the shape of the flat screen.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a rear garnish of an automobile will be described below with reference to the drawings.

As shown in FIG. 9, a rear garnish 1 as a printing object made of a plate-shaped synthetic resin is attached to a rear portion 4 of a body 3 of an automobile 2, and a character group 5 is screen-printed on the front surface thereof. Have been. As shown in FIG. 7, the entire rear garnish 1 is formed in an arc shape having a predetermined curvature, and on the rear surface thereof, a ridge 6 extending in the longitudinal direction is provided.
Are integrally formed. The entire ridge 6 projects obliquely downward with respect to the rear surface of the rear garnish 1.

A screen printing machine 7 shown in FIG. 8 is detachably mounted on a screen printing machine which is a known technique not shown. The screen plate 7 is an aluminum plate frame 8
And a screen 9 made of Tetron. The screen 9 is provided with a plate hole 10 for transferring ink to the character group 5, and the entire plate hole 10 is curved according to the curvature of the warp of the rear garnish 1. That is, after printing on this screen 9 in a state in which the warpage of the rear garnish 1 has been eliminated, when the warp of the rear garnish 1 returns, the desired font can be obtained. A squeegee 11 made of synthetic resin, which constitutes a part of the screen printing machine, is slidably disposed on the screen 9.

Next, a method of screen printing on the front surface of the rear garnish 1 configured as described above will be described. First, when screen printing is performed, a receiving jig for fixing the rear garnish 1 is manufactured.

As shown in FIG. 1, in order to eliminate the radius 34a of the above-described conventional receiving jig 34, the receiving jig main body 12 is cut at a position shown by a two-dot chain line in FIG. (Shown in FIG. 2). Subsequently, as shown in FIGS. 2 and 3, a hardened resin 13 such as an epoxy resin is adhered to the rear garnish 1 on the rear surface of the rear garnish 1 without unevenness so as to include the ridge 6. The cured resin 13 is selected not to have an adhesive action on the back panel. Then, the rear garnish 1 is pressed against the upper surface 12a of the receiving jig body 12 in a state where the rear garnish 1 is warped against its elastic force. At the same time, a plurality of belts 14 are wound around the rear garnish 1 and the receiving jig body 12 and fastened so as to keep the two butts 12 butted together until the cured resin 13 is hardened. That is,
The bow-shaped rear garnish 1 is attached to the receiving jig body 12 while keeping the front side, which is the printing surface, flat.

At this time, when the receiving jig main body 12 and the rear garnish 1 are set on the screen printing machine (not shown), the end portion 10a of the plate hole 10 of the screen 9 and the rear garnish 1 located at the end portion 10a. The distance L1 from the upper surface portion 1a and the plate hole 10 of the screen 9
The difference in the distance L2 between the intermediate portion 10b of the rear garnish 1 and the intermediate portion 1b of the rear garnish 1 is generally within 3 mm (the range in which screen printing is possible).

After a predetermined time has passed and the cured resin 13 has been cured,
As shown in FIG. 4, the belt 14 is removed, and the rear garnish 1 is temporarily removed from the cured resin 13. The removed rear garnish 1 is of course restored to the bow shape by its elastic force. At this time, as shown in FIG. 5, the cured resin 13 is adhered to the receiving jig body 12, and the manufacturing of the receiving jig K is completed. Then, the receiving jig 12 from which the rear garnish 1 has been removed is fastened and fixed to a base plate 16 constituting a part of the screen printing machine (not shown) by bolts or the like. When the cured resin 13 is cured, an engaging groove 15 is formed at a position corresponding to the ridge 6 of the rear garnish 1 on the upper part of the receiving jig K. That is, the locking groove 15 is formed along the longitudinal direction of the receiving jig 12.

Thereafter, as shown in FIG.
The rear garnish 1 having the side bow shape is bent again to the side opposite to the warp with respect to the locking groove 15, and the protrusion 6 of the rear garnish 1 is engaged in the locking groove 15 while maintaining this state.
That is, the rear garnish 1 is maintained in a flat state by the engagement of the ridge 6 and the locking groove 15 without being restored to the bow shape.

Then, the screen 9 of the screen plate 7 is arranged on the upper surface of the rear garnish 1 at a predetermined interval,
By operating an operation button (not shown), the tip of the squeegee 11 slides while applying pressure to the screen 9 while maintaining a predetermined angle, whereby the character group 5 is printed on the front of the rear garnish 1 and Screen printing work is completed. Thereafter, the engagement between the ridge 6 and the locking groove 15 is released, the printed rear garnish 1 is removed from the receiving jig 12, and a series of printing operations is completed. Then, a new rear garnish 1 not printed on the surface
If it is desired to print on the receiving jig 12 as described above, a series of screen printing operations described above are repeated.

The character group 5 of the rear garnish 1 printed on the receiving jig 12 is, as shown in FIG.
Although the whole is printed in a curved state, when the rear garnish 1 is received and the jig 12 is removed, it is restored in an arc shape, so that the character group 5 becomes linear along the longitudinal direction of the rear garnish 1.

As described above, by engaging the ridge 6 of the rear garnish 1 in the locking groove 15, the receiving jig 12
In contrast, the rear garnish 1 can be held against the bow warpage, and the screen plate is arranged close to the upper part of the rear garnish 1 in this holding state. To end the printing operation.

Further, by using the cured resin 13, the locking groove 15 can be easily formed in a state where the rear garnish 1 is deformed to the side opposite to the warp, so that the receiving jig K can be easily manufactured. Can be.

As described above, the present invention is not limited to the above-described embodiment, and can be arbitrarily changed as follows without departing from the spirit of the invention. (1) In the above embodiment, the locking groove 15 is formed of hardened resin on the upper surface of the receiving jig 12 so that the difference between the distances L1 and L2 is within 3 mm. The difference may be arbitrarily changed according to the curvature, etc. Therefore, in this manner, the number of times of printing can be reliably reduced as in the above embodiment.

[0022] (2) In addition to the shape shown in the ridge portion 6, as shown in FIG. 10, the tip portion is integrally formed along an engaging portion 20 that Do thick in the longitudinal direction at curing resin Lock groove 21
May be formed. By doing so, the locking portion 20 is locked with the locking groove 2.
In the state where the rear garnish 1 is engaged in the rear jig 1, the rear garnish 1 is harder to come off from the receiving jig K.

[0023] (3) The material of the screen 9 has been used which consists of Tetron, in addition to this, silk, nylon, poly an ester, may be changed to stainless steel or the like.

[0024]

As described in detail above, the present invention has an excellent effect of reducing the number of screen printing steps of a warped printing substrate made of a synthetic resin.

[Brief description of the drawings]

FIG. 1 is a front view showing a receiving jig before cutting in this embodiment.

FIG. 2 is a front view showing a state before a printing medium is adhered to a receiving jig.

FIG. 3 is a front view showing a state in which the receiving jig and the printing medium are fastened and held by a holding belt.

FIG. 4 is a front view showing a state before the printing medium is removed from the receiving jig after the cured resin is bonded to the receiving jig.

FIG. 5 is a sectional view taken along the line AA of FIG. 4;

FIG. 6 is a front view showing a state in which the screen plate is arranged close to the printing medium.

FIG. 7 is a perspective view showing a printing medium.

FIG. 8 is also a plan view showing a screen plate.

FIG. 9 is a perspective view showing a state where the printing medium is attached to the body of the automobile.

FIG. 10 is a cross-sectional view showing another embodiment and showing a state in which a printing medium and a receiving jig are engaged.

FIG. 11 is a front view showing a conventional technique, and showing a state in which a screen plate is arranged close to a printing medium.

FIG. 12 is a perspective view showing a state in which the printing medium is attached to the body of an automobile.

[Explanation of symbols]

1: Rear garnish (substrate to be printed), 7: Screen plate, 9: Screen, K: Receiving jig

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. ⁷ , DB name) B41F 15/30 B41M 1/12

Claims (1)

(57) [Claims] A ridge portion (6) formed on a printing body (1) made of a synthetic resin having a warp with respect to a receiving jig (K) ;
Engage the engaging groove (15) formed in the receiving jig (K).
The receiving jig (K) is marked with
The printing body (1) is held against its warpage, and in this holding state, the screen (9) of the screen plate (7) is placed close to the upper part of the printing medium (1) to perform screen printing. Screen printing method for resin products.