JPS6141548A - Screen printing method to square tube shaped work - Google Patents

Abstract

PURPOSE:To make it possible to apply printing to three or more of surfaces, by rotating a work by using the vicinity of the ridge line part of the work as a rotary center when a squeezee came near to the ridge line part of said work. CONSTITUTION:The bottom part of a square bottle is inlaid with a receiving plate 66 and the mouth part 90 of the bottle is pressed by a clamp apparatus 67 while a screen printing plate 5 is fallen to be contacted with the surface 91 of the bottle and a squeezee 3 is laterally moved to apply printing to the upwardly directed surface 91 of the bottle. When the squeezee 3 comes near to the ridge line part of the bottle, a moving table 41 advances by a detector. The rotor 71 on the table 41 is pressed to the circular arc surface of the guide plate 72 provided to a transfer passage by a spring 40 with the running of the moving table 40 to be frictionally rotated and the bottle is also rotated by the frictional rotation. The moment the rotor 41 is contacted with both of first and second guide plates 72, 72a, that is, the moment the rotor 71 is reversed by 90 deg., the running of the moving table 41 is stopped and the bottle is stopped in such a state that the next surface 93 thereof is contacted with the screen printing plate 5. Next, the squeezee 3 again advances to perform printing to the surface 93 and, when the squeezee 3 reached the final end of the surface 93, said squeezee 3 is stopped.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention is directed to a method of screen printing a rectangular cylindrical workpiece such as a fishing spot.

[Conventional example]

Conventionally, screen printing on truly cylindrical workpieces has been put to practical use.

In this printing method, a workpiece is fitted onto a rotating support shaft placed below a screen printing plate, and while the workpiece is brought into contact with the printing plate, the cylinder is rotated in accordance with the horizontal movement of the printing plate.

However, even when the above method is applied to a rectangular cylindrical workpiece, the distance from the axis to the surface of the workpiece is not constant, and when the cylinder is rotated, the distance between the flat surface of the cylinder and the printing plate is not constant. Is it possible to print a continuous pattern on the outer circumference of the cylinder because there is a gap between them? Ta.

Therefore, the applicant previously proposed a method of printing a continuous pattern on two or more surfaces of the workpiece, including the ridgeline (Patent Application No. 58
-1.47705). This method involves supporting a rectangular cylindrical work horizontally below a screen printing plate so that it can rotate freely and applying it to the printing plate, pressing a squeegee downward to press the soft printing plate against the work, and then pressing the printing plate against the printing plate. While moving horizontally, the workpiece is rotated at its side along the direction of movement of the printing plate, and the difference in distance between the workpiece surface and the ridgeline from the center of rotation of the workpiece is absorbed by the deflection of the screen printing plate. did.

[Problem that the invention seeks to solve]

The above printing method for rectangular cylindrical workpieces had no problems with small-diameter workpieces with approximately square cross-sections, but the larger the ratio of the length to width of the cross-section is, the more the workpiece has to be rotated. There is a problem in that when the screen printing plate is subjected to strain, the screen printing plate may be damaged or printing may be misaligned.

[Means to solve the problem]

In order to solve the above-mentioned problem, the method of the present invention places the - side (91) of the rectangular cylindrical workpiece (9) on the screen printing plate (5) and prints on this side (91) by moving the squeegee (3). administer. When the squeegee (3) approaches the ridgeline of the workpiece (9), the workpiece (9) is rotated around the ridgeline (near the sieve) as the center of rotation, and the next surface (93) is moved onto the printing plate ( 5), move the squeegee (3) again and repeat the above operation to print on three or more surfaces of the workpiece.

[Functions and Effects J Since the workpiece (9) rotates around the ridgeline (92), the workpiece can be rotated without putting any force on the screen printing plate (5), regardless of the ratio of the length and width of the cross section of the workpiece. The surfaces of the workpiece can be sequentially applied to the screen printing plate, and a continuous pattern can be printed on adjacent surfaces including the ridgeline portion (92) of the workpiece.

〔Example〕

In the screen printing apparatus used in the method of the present invention, a lifting frame (13) is provided on a slide block (1) that reciprocates laterally on a guide rod (111 (12i).
3) is provided with a cylinder device (14) in which a squeegee (3) is attached to a piston rod (15).

A doctor (31) is provided near the squeegee (3) so as to be movable up and down.

The above slide block (1) is equipped with a servo motor (21).
A pinion (22) driven by is provided and meshes with a rack surface (23) formed on one guide rod (11) of the slide block (1) to constitute a lateral reciprocating device (2) for the squeegee (3). are doing.

A screen printing plate (5) is arranged below the squeegee (3) so as to be movable up and down, and ink (51) is placed on the printing plate.

A movable and rotational support device (4) for a rectangular cylindrical workpiece (9) is provided below the printing plate (5).

The workpiece (9) of the example is a fishing spot with a mouth (90+) at one end, a width of about 15 cm, and a thickness of about 5G. have.

The movable rotation support device (4) includes a support device (6) that detachably supports the fishing spot in a horizontally rotatable manner, a drive device (7) that rotationally drives the support device (6), and a support device (6) that can be raised and lowered. A moving platform (4
]), and a travel drive device (421) that drives the mobile platform to travel.

The moving table (41) is slidably arranged on a parallel guide rod (431), and a servo motor (431) is mounted on the table (41).
A traveling drive device (42) is constructed by disposing a pinion (45) that rotates by a mechanism 4), and engaging the pinion with a rack (46) provided in parallel with the guide rod (43).

A pair of columns (471 (49) with guide grooves (49
A support (6) is arranged in between so as to be movable up and down.

The support (6) has six sides of the parallel end plate 1 projecting upward from both ends of the horizontal plate (61), and a vertically long projecting piece (surface) is provided on the outer surface of each end plate, and the projecting piece (surface is slidably fitted into the guide groove (481) of the support column (47).

The support (6) is constantly urged upward by a spring (40).

A boss is protruded from the upper end of the 10,000 end plate 6 bottle, and the boss (641 has a rotational axis parallel to the screen printing plate (5) and orthogonal to the moving direction of the squeegee (3)). The receiving plate (@
The center of the is attached to the inner end of the rotating shaft (6ω).

The above-mentioned rotational axis value) is fitted into the boss (641) and rotates freely, but is prevented from moving in the axial direction.

A clamping device (surface) is provided at the upper end of the other end plate I4 to press and clamp the fishing hole opening (9Q) on the extension of the rotating shaft (65I).

The clamp device (67) is a device in which a conical holding member (67) corresponding to the mouth of the fishing spot is rotatably connected to the air cylinder device.

A boss (64a) is provided on the outer surface of the six end plates to which the clamp device (@) is attached, and a boss (64a) is provided protrudingly on the extension of the axis of the clamp device (671), and a rotary shaft field is freely rotatably attached to the boss (64a). A disc-shaped rotating body ff1l (71+) is attached to the tips of the shaft (60) and the rotating shaft (65).

The rotating body (71) has a diameter equal to % of the diagonal length l of the fishing spot, and a hard rubber layer (not shown) with a large friction coefficient is formed on the outer periphery.

Three disc-shaped guide plates (72) each having the same diameter as the rotary body (71) are fixedly provided on the transition path of both rotary bodies as the moving table (41) travels.

First and second in order downstream in the lateral movement direction of the squeegee (3).
, 3rd guide board (72i (72a) (72b),!
:Then, the distance 12 between the cores of the first and second guide plates (72+ (72a)) matches the thickness 13 of the bottle, and the distance l! between the cores of the second and third guide plates (72a) (72b)! 4 corresponds to the horizontal length of the bottle, 15.

The support (6) was rotated 90 degrees from a state in which its rotating body ('71) was in contact with the lower surfaces of both the first and second guide plates (72) to the side between the first guide plates. The position is a home position in which the bottle can be supported with its wide side (91) parallel to the screen printing plate (5).

The screen printing device operates as described below using a detector (not shown) placed at a suitable location, and prints on a plurality of surfaces including the ridgeline of the fishing spot.

The receiver fits the bottom of the fishing spot into the recess (66a) of the plate (66),
The mouth part (90) of the bottle is pressed by the holding member (68) of the clamp device +67+ to fix the bottle to the support (6).

Next, the screen printing plate (5) is lowered, and the screen printing plate (5) is lowered.
) on the side of the bottle (91).

Lower the squeegee (3) and hit it against the printing plate (5), and in this state, move the squeegee (3) laterally to align the upward surface (9) of the bottle.
1) Print.

When the squeegee (3) hits the ridgeline (92) of the bottle, the moving table (41) is moved forward by the detector.

The rotating body (71) on the table is moved by the movement of the moving table (41).
(71) is pressed by a spring (40) against the arcuate surface of a guide plate (72) provided on the transition path of the rotating body (71) and rotates by friction, so that the rotation axis (65) is attached to the rotating body (71). The receiver attached through the plate also rotates between the plates, which also rotates the bottle.

The rotating body (71) is connected to the first and second guide plates (72+ (72a
), that is, the moment the rotating body (71) is reversed 90 degrees, the movement of the moving table (41) stops, and the fishing place applies the next side (93) to the screen printing plate (5). It comes to rest in the same position.

Next, the squeegee (3) moves forward again to print on the core (93), and when it reaches the end of the core (93), the squeegee (
3) is stationary.

The movable table (41) travels again, and the rotating body (71) contacts the arcuate surface of the second guide plate (72a) and rotates by friction until it reaches 90 degrees.
The movable table (41) stops traveling and the squeegee (3) moves forward at the moment it contacts the third guide plate (72b).

When the squeegee (3) reaches the next ridgeline (911i) of the fishing spot, the squeegee (3) comes to rest and the moving platform (41) moves.

When the rotating body (71) rotates by friction around the outer periphery of the third guide plate (72b) and rotates 90 degrees, the moving table (41) stops and the squeegee (3) moves.

By the above action, 4 sides of the fishing spot + 91j 1 color (gS+
Screen printing can be performed continuously on the i-side.

Raise the squeegee (3) and printing plate (5) and lower the doctor (31). In this state, the squeegee and doctor (
31) to retreat.

During this time, the clamp on the fishing spot is released, the printed bottle is replaced with a new bottle, and the moving platform (41) is moved back to its original position.

Repeat the above operation to print one after another.

[Brief explanation of drawings]

FIG. 1 is a perspective view of the main part of the screen printing apparatus, FIG. 2 is a side view of the same, and FIG. 3 is an explanatory diagram of the moving state of the workpiece. (3)...Squeegee (5)...Screen printing plate (9)...Work (91)...Surface (92)...Ridge line part

Claims (1)

[Claims] [1] One side of the rectangular cylindrical workpiece (
91) and move the squeegee (3) laterally to touch the surface (91).
1), and the squeegee (3) is applied to the ridgeline of the workpiece (
92), the movement of the squeegee (3) is stopped and the workpiece (92) is rotated around the ridge line or its vicinity.
) and rotate the next side of the workpiece (93) to the printing plate (5).
A method in which the squeegee is moved again to print on the surface (93), and the above operation is repeated to print on three or more surfaces of the workpiece.