ES2586464B1 - TAMPOGRAPHY MACHINE - Google Patents

Abstract

Machine (1) for pad printing, of the type comprising a frame (2) with an upright (3) for an image plate (4), a rotating buffer (5) and an inkwell (6) for inking the buffer (5) , which comprises a rotating support (7) provided with rotating means for holding the object (8) to be padded.

Description

OBJECT OF THE INVENTION

The present invention relates to a pad printing machine that allows the rotational application of pad printing on objects, minimizing the appearance of cuts in the continuity of the printing made.

BACKGROUND OF THE INVENTION

Pad printing is a reproduction process that is carried out by means of pad printing machines that comprise a frame with an upright (flat, or usually cylindrical) in which a metal or plastic image plate can be mounted, where the image to be printed is precisely recorded configuring a gravure. In this image plate ink is applied by means of an inkwell, usually provided with a scanning knife, and then a silicone buffer or a similar material, usually cylindrical, presses on the engraving of the plate collecting the gravure ink and transferring it to the piece to be padded. It is a widely used system for marking objects.

The image plate is usually made of polymer or steel photo, the photopolymer plates being more extended since they are easier to generate, even by their own means, while those of steel frequently require the intervention of specialized companies.

However, the printing result of current machines has cuts in the printing of objects in volume that require printing on several sides, such as platforms or shoe soles. This is an inconvenience that is remedied with the use of the pad printing machine of the invention.

DESCRIPTION OF THE INVENTION

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The pad printing machine of the invention has a configuration that allows a continuous application of pad printing, minimizing or directly avoiding the appearance of any type of joint, cut or discontinuity in the printing made. It is applicable to any object to be padded that has a volume, for example soles or platforms of footwear, bottles, toys, etc.

the

The machine is of the type that comprises a frame with an upright for an image plate, understood as an upright an element or support that allows interchangeable mounting. It also comprises a rotating buffer and an inkwell for inking the buffer, which, according to the invention also comprises a rotating support provided with rotating means for holding the object to be padded.

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In this way, the combined rotational movement of the tampon and the object to be padded is achieved, obtaining a continuous printing and with a minimum number of print cuts on the three-dimensional contour of the object in the area of contact with the tampon.

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DESCRIPTION OF THE DRAWINGS Figure 1.- Shows a perspective view of the machine of the invention.

Figure 2.- Shows a side view of the machine of the invention.

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Figure 3.- Shows a detail of the machine of the invention.

PREFERRED EMBODIMENT OF THE INVENTION

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The pad printing machine (1) of the invention is of the type comprising: a frame (2) with an upright (3) - in this case a flat plate - for an image plate (4) - photopolymer in this particular case -, a rotating buffer (5) a silicone roller in this case - and an ink fountain (6) for inking the buffer (5) whose machine (1), according to the invention, also comprises a rotating support (7) ( see figs 1 and 2) provided with rotating means for holding the object (8) to be padded.

The rotating support (7) comprises a first axis of rotation (7a) parallel to the second axis of rotation

(5a) of the rotating buffer (5), which is cylindrical, so that an impression is made

cylindrical Alternatively, although not shown in the figures, the first axis of rotation (7a)

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of the rotating support (7) may not be parallel to the second axis of rotation (5a) of the buffer (5)

rotating, so that prints are made in other ways, adapted to the contour of the

object (8) (for example conical if the axes are convergent and the buffer (5) is conical).

In addition, it is provided that the rotating support (7) preferably comprises a last

(9) for holding the object (8) to be padded to improve its support.

the

The rotating support (7) is mounted on the frame (2) through folding means

on the buffer zone (5). Specifically in the example shown in the

figures, the rotating support (7) comprises facing arms (11) and a joint

(12) of union to the frame (2) to allow its despondency, being the means

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folding relating the rotating support (7) and the frame (2). In these arms (11)

two shafts (14, 14a) are arranged (see fig 1) for holding the object (8) (in this

case through the last (9)), at least one of which comprises a drive

swivel (15). This configuration is simple, since it only requires two points of support

for the object (both semi-axles) and the pivot joint (12). Drive

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swivel (15) ideally comprises a first motor (15a) and a first belt (15b),

being also a simple configuration. On the other hand, the folding means include

in this non-limiting example of the invention cylinders (10) (pneumatic and / or hydraulic),

which allows an adequate speed of action.

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The amount (3) for the image plate (4) comprises in this example an iron (16)

flat (see fig 3) that is mounted on a carriage (17) provided with

linear reciprocating drive along guides (25) in the scope of the

inkwell (6) (under it). Said reciprocating linear drive means comprise a

second motor (18) and a second belt (23) (see fg 2). This configuration facilitates the

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change of the image plate (4) with respect to cylindrical uprights, and better inking.

The inkwell (6) is preferably arranged in a fixed support (19) on the carriage (17) that carries the plate (16) of the upright (3) of the image plate (4), so that the plate is printed of image (4) with the reciprocating movement of the carriage (17). This causes the ink to deposit by gravity.

The arrangement of a cleaning roller (20) of the buffer (5) (see fig. 1 and 3) is also provided in the machine (1). Said cleaning roller (20) is made of drying material and is in contact with the buffer (5) after the printing application area to dry the paint residue after printing before the next inking. The buffer (5) and / or et cleaning roller (20) are mounted on the frame through adjustable slides (21) (see fig. 3) to precisely adjust its position and contact pressure during operation through linear actuators (22).

The machine is complemented by an obvious electronic and / or electromechanical controller, not shown, that governs the operation of the different elements.

Describing sufficiently the nature of the invention, it is indicated that the description thereof and its preferred embodiment should be construed in a non-limiting manner, and that it encompasses all of the possible embodiments that are deduced from the content of the present specification. and of the claims.

Claims (13)

1.-Machine (1) for pad printing, of the type comprising a frame (2) with an upright

(3)

for an image plate (4), a rotating buffer (5) and an ink fountain (6) for inking the buffer (5); characterized in that it comprises a rotating support (7) provided with rotating means for holding the object (8) to be padded.

2. Machine (1) for pad printing according to claim 1 characterized in that the amount

(3)

comprises a flat iron

3. Machine (1) for pad printing according to any of the preceding claims characterized in that the rotating support (7) comprises a first axis of rotation (7a) parallel to the second axis of rotation (5a) of the cylindrical rotating buffer (5). 4.-Pad printing machine (1) according to any of claims 1 or 2, characterized in that the rotating support (7) comprises a first axis of rotation (7a) not parallel to the second axis of rotation (5a) of the cylindrical buffer (5) rotary. 5.-Pad printing machine (1) according to any of the preceding claims, characterized in that the rotary support (7) comprises a last (9) for holding the object (8) to be used. B.-Pad printing machine (1) according to any of the preceding claims, characterized in that the rotary support (7) is mounted on the frame (2) through folding means on the buffer actuation zone (5). 7. Machine (1) for pad printing according to claim 6 characterized in that the rotary support (7) comprises facing arms (11) and an arliculation (12) joining the frame (2) for folding, the folding means being related to the support rotary (7) and the frame (2); comprising in said arms (11) two axles (14, 14a) for holding the object (8), at least one of which comprises a rotary drive (15). 8.-Machine (1) for pad printing according to claim 7 characterized in that the Rotary drive (15) comprises a first motor (15a) and a first belt (15b). 9.-Pad printing machine (1) according to any of claims 6 to 8, characterized in that the folding means comprise cylinders (10). 10.-Pad printing machine (1) according to any of the preceding claims characterized in that the amount (3) for the image plate (4) comprises an iron (16) flat that is mounted on a carriage (17) provided with reciprocating linear drive means in the scope of the inkwell (6). 11. - Pad printing machine (1) according to claim 10 characterized in that the reciprocating linear drive means comprise a second motor (18) and a second belt (23). 12. Machine (1) for pad printing according to any of claims 10 or 11, characterized in that the inkwell (6) is arranged in a fixed support (19) on the carriage (17) that carries the plate (16) of the upright ( 3) of the image plate (4). 13.-Pad printing machine (1) according to any of the preceding claims characterized in that it comprises a cleaning roller (20) of the buffer (5). 14.-Machine (1) for pad printing according to claim 13 characterized in that the buffer (5) and / or the cleaning roller (20) are mounted on the frame through adjustable slides (21) and linear actuators (22).