JPS599342B2 - Mold for forming ruled lines on laminated cardboard - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a mold for forming ruled lines on laminated cardboard, which can easily bend and add ruled lines to the laminated cardboard.One embodiment will be described in detail with reference to the drawings as follows. It is as follows.

For forming ruled lines a on the edge i of laminated cardboard 1 (for example, trade name Pasco) in which each layer is bonded by combining a cellulose material and a synthetic resin layer with adhesive properties.For forming ruled lines on laminated cardboard. It is related to the mold.

The male mold 2 (upper mold) of this press mold has a lower surface formed with gently angled chevron-shaped grooves 5, 5', and a lower surface with a thousand-faced 3 in the center.
On the other hand, the female mold 7 (lower mold) has a protrusion 6 formed on the slopes 4, 4' that widen as they reach upward on both sides. A concave groove 8 that is slightly deeper than the height of the protrusion 6 is formed, and both sides of the opening of this concave groove 8 are formed with chevron-shaped protrusions 9, 9 that match the chevron-shaped concave lines 5, 5'.
It was formed in '.

Reference numeral 11 is a peeled portion, and 12 is a non-peeled portion.

Conventionally, in order to add ruled lines to laminated cardboard, the laminated cardboard is pressed using a female die having a V-groove and a male die having a V-head that fits the V-groove.

However, with this processing method, the adhesion of each layer is destroyed only in the narrow part of the laminated cardboard located at the tip of the V head, so although it is possible to use this ruled line as a dividing line and bend it in one direction, it cannot be bent in both directions. It cannot be bent, and for example, even if a box is formed from this cardboard, the base of the lid cannot be bent freely, which is inconvenient.

The present invention solves this problem by forming the lower surface into gently angular grooves 5, 5', with the lower surface being a flat surface 3' in the center and the slopes 4, 4 that widen upward as they reach the center. ′
A male mold 2 having a vertically formed protrusion 6, and a concave groove 8 having a width slightly wider than the base width of the protrusion 6 and slightly deeper than the height of the protrusion 6.
, and both sides of the opening of this concave groove strip 8 are connected to the chevron-shaped strip 5,
A female mold 7 formed on a chevron-shaped convex ridge 9, 9' that matches the 5';
A press die is formed using the press die, and the ridgeline part 10 of the laminated cardboard 1 is pressed and ruled line processing is performed using this press die. By inserting the concave groove 8 which is slightly wider than the base width of the ridge 6 and slightly deeper than the height of the ridge 6, it is drawn into the groove 8, and at the same time, both slopes 4, 4' of the ridge 6 and the concave groove 8 are inserted. It is firmly clamped and pressed from both sides by both inner surfaces of the groove 8.

As a result, each adhesive layer of the pressed portion of the laminated cardboard 1 is peeled off due to the internal strain, and becomes bendable.

At this time, it is especially important that the laminated cardboard 1 is pressed while being firmly clamped from both sides, so that it is securely pressed into a single piece and the clamped portion as shown in Fig. 3 is pressed. The peeled portion 11 becomes a lumpy state in which each layer has been peeled off well, and it becomes possible to form a ruled line a with better bending.

Furthermore, in this case, since the lower surface of the protrusion 6 is formed to have a 1,000-sided shape, no concentrated force is applied to the portion of the laminated cardboard 1 that comes into contact with the lower surface of the protrusion 6, so that the internal strain becomes uniform. The peeling condition is also uniform.

Further, since the width of the part peeled off by pressing is approximately equal to the distance from one base to the other base of the protrusion 6, it becomes easier to bend and functions like a hinge.

Then, gentle chevron-shaped grooves 5, 5' are formed at the bases on both sides of the protrusion 6 of the male mold 2, and both sides of the opening of the groove 8 of the female mold γ are formed with the chevron-shaped grooves 5, 5'. A chevron-shaped protrusion 9 that fits
9', so when the male mold 2 attached to the press reaches the bottom dead center, both edges of the peeling part 110 of the laminated cardboard 1 will meet the chevron-shaped protrusions 9, 9' of the female mold 7 and the male mold 2. It is linearly compressed by the chevron-shaped grooves 5 and 5'.

Therefore, the peeled part foot and the non-peeled part 12 are clearly separated, and the peeled part 11 is prevented from expanding during use, resulting in a durable ruled line process.

Furthermore, since the male mold 2 and female mold 7 used in the present invention have a simple structure, they are easy to manufacture and exhibit many excellent effects such as being able to provide ruled line processing at low cost.

[Brief explanation of drawings]

FIG. 1 is a front view before pressing, FIG. 2 is a perspective view of a part of the product after pressing, and FIG. 3 is an enlarged view of the main part. 1... Laminated cardboard, 2... Male type, total.
... Plain, 4,4'... Slope, 5,5'.
...Chevron-shaped groove, 6...Protrusion, γ...
...Female type, 8... Concave groove, 9,9'-...
・Chevron-shaped convex stripe, 10...ridge line part.

Claims (1)

[Scope of Claims] 1. A ruled line of a laminated cardboard having the following structure, which forms a ruled line on the ridgeline of a laminated cardboard in which each layer is bonded by combining a cellulose material and a synthetic resin layer having adhesive properties. Mold for processing. The lower surface is formed into a gentle chevron-shaped concave groove, and the lower surface is flat, and both sides are sloping ridges that expand upward as they reach the top. A press mold consisting of a female die in which a groove with a slightly wider width and slightly deeper than the height of the protrusion is formed, and both sides of the opening of the groove are formed into a chevron-shaped protrusion that matches the chevron-shaped groove.