JPH0813500B2 - Label suction means of label supply device and label supply method - Google Patents

Description

TECHNICAL FIELD The present invention relates to a label suction means of a label supply device for supplying a label into a mold and a label supply method.

(Prior Art) Conventionally, in-mold molding has been known in which a label is previously supplied to a cavity forming wall surface of an opened mold to perform plastic molding, and a label is attached to a surface of a molded product during a molding process. ing.

A label supply device that supplies a label to a cavity forming wall surface when performing this in-mold molding includes a main cylinder that reciprocates between a label magazine arranged near the mold and the mold, and a main cylinder of this main cylinder. It has a sub-cylinder attached to the front end and extending and contracting in the direction orthogonal to the main cylinder, and the front end of the sub-cylinder is provided with a label suction means for sucking the label of the label magazine and delivering it to the cavity forming wall surface. There is. The label suction means is usually constituted by a conical suction pad.

(Problems to be Solved by the Invention) However, when the label is supplied from the label magazine to the cavity forming wall surface by the label suction means of such a conventional label supply device, the label is thin or the label is formed of a plastic film. If so, the label may be curled during the movement from the label magazine to the cavity forming wall surface, or the label may not be placed at a predetermined position on the cavity forming wall surface due to contact with the mold.

(Means for Solving the Problems) In order to solve the above problems, the label suction means of the label supply device according to the present invention is a label for a label supply device that supplies a label to a cavity forming wall surface of a mold that has been opened. In the suction means, the label suction pad as the main body of the label suction portion having the label suction surface is molded from an elastically deformable material, and the label suction pad deforms and adheres in correspondence with the curved state of the cavity molding wall surface. The label suction surface has an air suction hole for sucking the entire label.

Further, the label supply method of the present invention uses the label adsorbing means according to claim 1 to adsorb the entire label to the cavity forming wall surface of the mold, and presses the label adsorbing pad against the cavity forming wall surface via the label. By doing so, the suction pad is deformed in conformity with the shape of the cavity molding wall surface and conforms to the label suction surface, whereby the label is sucked to the cavity molding wall surface.

(Operation) According to the label supply device and the label adsorption method of the present invention, the entire label is adsorbed when the label is taken out from the label magazine, so that the label does not curl and the label is conveyed when the adsorbed label is conveyed. Can be prevented from coming into contact with the mold, and moreover, the label suction surface is elastically deformed in the state that the label is sucked and adheres in correspondence with the curved shape of the cavity forming wall surface, so that the cavity forming wall surface is curved. However, the label can be set on the cavity forming wall surface without misalignment. Further, since the label is adsorbed by the entire label adsorbing portion, even a thin label can be accurately set at the label placement position without causing curling.

(Example) Hereinafter, a label suction means of a label supply device according to an example of the present invention will be described with reference to the drawings.

FIG. 1 shows a label adsorbing means according to a first embodiment of the present invention, in which facing cavities forming walls 2 and 2 of a mold 1 and 1 have a curved shape. Label placement positions 2a are provided on the wall surface portions. The labels 3 are taken out from the label magazine 4 sheet by sheet, and the label magazines 4 are arranged near the molds 1 and 1, respectively. Suction holes 2b, 2b for sucking air are opened at the label placement position 2a on the cavity forming wall surface 2.

The label supply device 5 is provided with a main cylinder 6 which is capable of expanding and contracting from the vicinity of the label outlet of the label magazine 4 toward a facing area when the molds 1 and 1 are opened, and a main cylinder 6 is provided at a tip portion of the main cylinder 6. A sub-cylinder 7 is provided which is extendable and contractible in the direction orthogonal to 6. Sub cylinder 7
Is driven by a drive motor 7a.
A label suction pad 8 for suctioning and picking up the labels 3 one by one from the label outlet 4a of the label magazine 4 is provided at the tip of the sub-linder 7 as a suction unit body. In the present embodiment, the label suction pad 8 has a label suction surface 8a having a shape that is substantially equal to the overall shape of the label 3 and that matches the label disposition position 2a of the cavity forming wall surface 2.
A plurality of air suction holes 9 for adsorbing the entire label 3 to the label suction surface 8a are opened on the label suction surface 8a, and the inner portions of the respective air suction holes 9 ,. They communicate with each other via 9a. The communication chamber 9a of the air suction holes 9, ... Is connected to an air control means (not shown) via the cylinder 7, and the air suction control of this air control means sucks air from the air suction holes 9 ,. Then, the label 3 is taken out from the label magazine 4. The shape of the air suction holes 9, ... Is not limited to this, and for example, the air suction hole 9'of the label suction pad 8'shown in FIG. 5 or the label suction hole 8 "shown in FIG. The air suction hole 9 ″ may be formed.

FIG. 7 shows the shape of the label suction means according to the second embodiment of the present invention, in which the label suction pad 10 as the suction portion main body is formed by an elastically deformable rubber rectangular pad. There is. A plurality of air suction holes 11 ,,, are opened in the label suction surface 10a of the label suction pad 10, and the inner portions of the air suction holes 11 ,,, communicate with each other via the communication chamber 11a. . This communication chamber 9a is connected to air suction means. Although the label suction surface 10a of the label suction pad 10 has a planar shape, since the material of the label suction pad 10 is a material that is elastically deformable,
When the label suction pad 10 contacts the label placement position 2a via the label 3 with the label suction face 10a sucking the label 3, the label suction face 10a bends following the curved shape of the label placement position 2a. (Refer to the chain line 12 shown in FIG. 7). The label suction surface 10a is curved and the label 3 is arranged at the position 2
When positioned at a, the suction of air by the suction suction holes 11 ,,, is stopped to return to normal pressure, and the label 3 is sucked by the suction holes 2b, 2b opened at the label disposition position 2a. Is set at the label placement position 2a. In this case, the label suction surface 10a between the air suction holes 11 ,, etc. may be provided with a recess 13 or the like for preventing deformation of the air suction holes 11 ,,.

In the label suction means of the label supply device according to the first and second embodiments, the label suction pads 8 and 10 for suctioning the label 3 correspond to the curved state of the label disposing positions 2b and 2b of the molds 1 and 1. The label magazine 4 is provided with the label suction surfaces 8a and 10a that are in close contact with each other, and the air suction holes 11 that suck the entire label 3 are opened on the label suction wall surfaces 8a and 10a.
When the label 3 is adsorbed and taken out from the label 3, the label 3 does not curl, and when the adsorbed label 3 is conveyed, it is possible to prevent the label 3 from fluttering and coming into contact with the molds 1 and 1. Since the suction surfaces 8a, 10a adhere to the curved shape of the label placement positions 2b, 2b in a state where the labels 3 are sucked, the label placement positions 2b, 2b are curved even if the label placement positions 2b, 2b are curved. The label 3 can be set at the positions 2b and 2b without displacement.

(Advantages of the Invention) As described above, in the label suction means of the label supply device according to the present invention, since the label suction pad is made of the elastically deformable material, the label is curled when the label is taken out from the label magazine. It is possible to prevent the label from coming into contact with the mold when the sucked label is conveyed, and moreover, the label suction surface adheres to the curved shape of the cavity forming wall while the label is sucked. Even if the cavity forming wall surface is curved, the label can be set on the cavity forming wall surface without displacement. Furthermore, since the label is adsorbed by the entire label adsorbing portion, even a thin label can be set at the label placement position without curling.

[Brief description of drawings]

FIG. 1 is a block diagram of a label suction means according to the first embodiment of the present invention, FIG. 2 is a block diagram of a cavity forming wall surface of a mold of the first embodiment, and FIG. 3 is a label suction of the first embodiment. FIG. 4 is a cross-sectional view of a state where the pad is in contact with the label placement position, FIG. 4 is a cross-sectional view of the label suction pad of the first embodiment, and FIG. 5 is a deformation of the label suction hole of the label suction pad of the first embodiment. 6 is an explanatory view showing a modified example of the label suction holes of the label suction pad of the first embodiment, and FIG. 7 is a sectional view of the label suction pad according to the second embodiment of the present invention. is there. 1 ... Mold 2 ... Cavity forming wall 3 ... Label, 4 ... Label magazine 5 ... Label supply device 7 ... Cylinder 8 ... Label suction pad, 8a ... Label suction surface 9 ... Air suction hole 10 …… Label suction pad 11 …… Air suction hole

Claims (2)

[Claims] 1. In a label suction means of a label supply device for supplying a label to a cavity forming wall surface of an opened mold, a label suction pad as a label suction part main body having a label suction surface is made of an elastically deformable material. The label suction pad is deformed and closely adhered in accordance with the curved state of the cavity molding wall surface, and an air suction hole for sucking the entire label is opened on the label suction surface. Label adsorbing means of the feeding device. 2. The label adsorbing means according to claim 1 is used to adsorb the entire label onto the cavity forming wall surface of the mold, and the label adsorbing pad is pressed against the cavity forming wall surface via the label, A label supply method, characterized in that the suction pad is deformed according to the shape of the cavity forming wall surface and conforms to the label suction surface, whereby the label is sucked onto the cavity forming wall surface.