JPS6076327A - Manufacture of formed product by laminating corrugated board - Google Patents

Abstract

PURPOSE:To improve remarkably the productivity of lamination forming by a method in which one side corrugated boards which are the second or later in lamination order, and coated with an adhesive, and then these boards are press formed together. CONSTITUTION:The liners b1, c1 of one side corrugated boards (b), (c) which are the second or later in lamination order, are coated with an adhesive, and three one side corrugated boards are laminated together. POVAL family is used for said adhesive, and the corrugated board has well concordance with said POVAL requiring suitable curing time. The total surfaces of the liners b1, c1 are uniformly coated with POVAL. Next, the laminate A composed of (a), (b), (c) is inserted between the punch S1 and the lower die S2 of a press at the state of the adhesive uncured (the punch S1 and the lower die S2 are coated with guard 2, 2). A formed product may be obtained by pressing and curing the laminate A. The press forming and adhering of one side corrugated boards may be simultaneously achieved. The improvement of productivity and cost down may be contrived.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for crushing a laminated cardboard molded product.

Laminated corrugated pole molded products are used as fixing members when packaging electrical products, and have conventionally been manufactured by the following manufacturing method.

That is, a plurality of single-sided corrugated boards are used as the corrugated board material to be laminated, these single-sided corrugated poles are press-molded into a predetermined shape, and the formed single-sided corrugated poles are then laminated and bonded with an adhesive. In such a manufacturing method, the reason why the single-sided corrugated board is press-molded first is that after the single-sided corrugated cardboard is laminated and bonded, it is difficult to press-form the laminate.

However, when using the conventional manufacturing method as described above, since the single-sided corrugated cardboard is bonded after press molding,
The shape of single-sided corrugated cardboard due to spring banks changes significantly, making it difficult to achieve dimensional accuracy of the molded product.Also, since press-molded single-sided corrugated cardboard is bent or curved, it is difficult to apply adhesive to the corrugated cardboard. The bonding work was troublesome and time-consuming, resulting in poor productivity and high costs.

The technical problem of the present invention is to be able to perform press molding and gluing of laminated single-sided corrugated cardboard all at once without having to separate them, thereby making it possible to obtain molded products with high dimensional accuracy, as well as to improve productivity and reduce costs. The present invention provides a method for manufacturing a laminated corrugated cardboard molded product.

In order to achieve the above-mentioned technical problem, the present invention focuses on the fact that the adhesive used for adhering single-sided corrugated poles requires a predetermined time to harden. A plurality of single-sided corrugated boards are laminated by applying an adhesive to the poles, and the laminated product of the single-sided corrugated poles is press-molded with the adhesive uncured, and after the adhesive has hardened, the molded laminated product is separated. A molded product is obtained by molding.

In the configuration of the present invention, the number of single-sided corrugated boards is approximately 2 to 4, but 3 is appropriate in consideration of the strength and workability of the molded product.

Embodiments of the present invention will be described below with reference to the drawings.

The manufacturing method of this example is as shown in FIG.
), and the molded product is obtained through the following steps.

First, single-sided cardboard from the second layer onwards (b) (C)
Adhesive (d) is applied to the liner (bl) (ct), and three sheets of single-sided corrugated cardboard (a), (b), and (c) are laminated. Adhesive (d) is a Popal type adhesive that is easily compatible with the cardboard and requires a suitable curing time, and the liner (
bl) Apply uniformly to the entire surface of (C1).

Next, a laminate of the single-sided cardboard (a), (b), and (c) (
A) with the adhesive (d) uncured, each one-sided corrugated board (a), (b), (C ) corrugated paper (az) (
bz) (cz) facing upward, and then lower the upper mold (31) as shown in Fig. 3 to form the laminate (A).
Press mold. Upper mold (Sl) in the press machine
A protective material (2) made of cardboard or the like is adhered to the mating surfaces of the upper mold (Sl) and the lower mold (B2).
Damages in a) and (c) are prevented. During press molding, the laminate (A) sandwiched between the upper die (SL) and the lower die (B2) is made of single-sided corrugated cardboard (a), (b) (, -,).
bends and rises while slipping on both sides, creating a difference in the height of the rising portions (la), (lb), and (1c). The laminate (A) has an upper mold (31) and a lower mold (
B2), that is, the state in which the upper mold (Sl) descends and presses the laminate (A), is maintained for a predetermined period of time until the adhesive (d) of the laminate (A) hardens. be done.

After the adhesive (d) has hardened, the upper mold (Sz) is raised to release the molded laminate (A) from the lower mold (B2), and each single-sided corrugated board ( Rising part of a) (b) (C) (Ia) (lb)
(lc) to obtain a molded product (B1) having a gutter-shaped shape as shown in FIG.

In this example, the shape of the molded product (B1) is a gutter type, but it is not limited to this, and for example, an L shape as shown in FIG.
It is also possible to obtain a molded product having the shape of a mold (Bz) or a molded product having a wavy shape as shown in FIG.

As explained above, the present invention uses a plurality of single-sided corrugated cardboards as the corrugated cardboard material to be laminated, applies adhesive to the liner of the second and subsequent single-sided corrugated cardboards in the stacking order, and laminates the plurality of single-sided corrugated cardboards. This single-sided corrugated board laminate is press-molded with the adhesive uncured, and after the adhesive has hardened, the molded laminate is released from the mold to obtain a molded product.

That is, according to the present invention, press molding of single-sided corrugated poles to be laminated is performed by effectively utilizing the curing time of the adhesive, and press molding and adhesion of single-sided corrugated cardboard can be performed at the same time. Because the adhesive is hardened when the laminate is released from the mold, the pressed shape of the laminate can be maintained as it is, making it possible to obtain molded products with high dimensional accuracy, as well as improving productivity and reducing costs. This is something that can be achieved.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view of laminated single-sided corrugated cardboard, Figures 2 and 3 are cross-sectional views showing the press molding process, Figure 4 is a perspective view of the molded product, and Figures 5 and 6 are the cross-sectional views of the molded product. It is a perspective view showing a modification. In addition, (a), (b), and (c) in the figure... single-sided cardboard (as) (
bl ) (CI) −= single-sided corrugated liner (
A)...Laminated product (d)...Adhesive

Claims (1)

[Claims] Multiple sheets of single-sided corrugated cardboard are used as the corrugated cardboard material to be laminated, and adhesive is applied to the liner of the single-sided corrugated cardboard that is second and subsequent in the stacking order, and multiple sheets of single-sided corrugated cardboard are laminated.
A method for manufacturing a laminated corrugated board molded product, in which the laminated product of single-sided corrugated cardboard is press-molded with the adhesive uncured, and after the adhesive has hardened, the molded laminate is released from the mold to obtain the molded product. .