JPS60101044A - Centrifugal molding method of laminate consisting of expanded layer and resin layer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for centrifugal molding of a laminate comprising a flow foam layer and a resin layer.

Conventionally, there is a centrifugal molding method as an example of a method for producing a laminate consisting of a foam layer and a resin liquid. That is, Fig. 1, Fig. 2
As shown in the figure, while rotating the mold 121 supported by a plurality of rings (υ), resin liquid is first poured into the mold (2), and after centrifugal molding, the resin liquid is heated and cured to form a resin layer (3).Then, the resin layer (
3) A large-sized foaming agent is introduced into the chamber and centrifugal molding is performed, and the large-sized foaming agent is heated and foamed to form a large-sized foamed layer (4). Next, a small foaming agent is introduced into the large foam layer (4) and centrifugal molding is performed, and the small foaming agent is heated and foamed to form a small foam layer (5). Thereafter, if necessary, a large foam layer (4) and a small foam layer (5) are laminated, and finally a resin layer (3) is laminated.

According to such conventional centrifugal molding methods, material must be added, centrifugally molded, and heated and hardened (foamed) for each layer, so a long molding time is required to obtain one laminate. As a result, efficient molding cannot be performed, and temperature control becomes complicated because the degree of FA for curing and final foaming differs for each layer. Furthermore, in the laminate obtained by the conventional method, each layer was completely circular and wavy, and some of the inner layers were wavy, making it impossible to obtain 4 diamond-shaped laminates.

The object of the present invention is to centrifugally mold a laminate consisting of a foam layer and a resin layer, which can be centrifugally molded efficiently in a short time, can easily control temperature, and can also produce a diamond-shaped laminate. The point is that it provides a molding method.

In order to achieve the above object, the method of centrifugal molding of a laminate consisting of a foam layer and a resin layer in the present invention uses a large specific gravity resin 1 (
! 1, a small specific gravity resin liquid, and a plurality of types of blowing agents with specific gravity differences between the specific gravity values of both resin liquids, and this mixture makes a difference in the curing temperature of both resin liquids, and 6. The foamed layers according to the foaming rule are differentiated by 1yK, and this mixture is put into the J mold, and the mold is rotated to centrifugally mold the layers due to the difference in specific gravity, and this is what it looks like! Gradually raise the heating temperature and heat in sequence. The reaction occurs in the S layer.

By using the method V of the present invention, the following effects can be expected. That is, by putting the mixture into a mold, centrifugally molding the layer according to the Hiton point, and then heating it,
As the heating temperature rises, each layer can be warped and cured or foamed in sequence, so that centrifugal molding of the laminate can be carried out efficiently in a short time, and the temperature can be easily controlled. Furthermore, during centrifugal molding of layers due to differences in specific gravity, by randomizing the position of curing or foaming by heating in the layer thickness direction, for example, the next curing or foaming can be performed inside or outside of the hardened or foamed layer. is possible,
The layer formed in the previous step can be deformed by the hardening or foaming force (moving force) at that time, thereby making it possible to obtain a laminate in which the intermediate layer is diamond-shaped.

An embodiment of the present invention will be described below based on FIGS. 3 to 7. First, as shown in FIGS. 3 and 4, a mixture is poured into a mold uD supported by a plurality of rings. This mixture @ consists of a high specific gravity resin liquid, a low specific gravity resin liquid,
It is composed of three types (multiple types) of foaming agents with a large difference in specific gravity at 1141 due to the two resins, and is shaped face-centered Jly into layers due to the difference in specific gravity by rotation of the mold aυ. That is, as shown in FIG. Specific gravity granule blowing agent (company)
Then, a small specific gravity foaming agent (Fl) and a small specific gravity resin liquid (Gl) are centrifugally molded in this order from the inner surface of the mold circle. At this time, both resin liquids (1/1 of N (G)! The foaming temperature and the foaming temperature of each foaming agent (Bl to tFl) are as shown in Table 1.
i degree jπ is attached.

Table 1 Therefore, when heated after centrifugal molding, d, i
As the temperature rises to VL, the large specific gravity resin 2 nights tAl is first hardened and molded 4'i (a resin layer is formed on the inner surface of the Ill, and then, as shown in FIG.
131 reacts to form a large foam layer 1.141 on the tree H'FI 7+ld un.

Then, due to the increase in ITi^ degree, foaming 1jlJ IcI
~ (technical?) reacts sequentially, and as shown in Fig. 7, a small foam layer (1st, large γ L foam wJt1!, small γ foam layer U) is formed.
η, large a foam layer U barrels are sequentially laminated and molded, and a resin layer (21) is laminated and molded on the innermost side.

The cylindrical laminate obtained by such molding is
It is removed from the molding mold, divided at appropriate points in the circumferential direction, and then unfolded into a plate shape, which is then used for the seating part of a sofa, etc.

In the above embodiment, the mold U was heated under the temperature conditions shown in Table 1.
The force ζ reacts sequentially from the inner surface of υ.The reaction position (order) may be random. That is, as shown in FIG. 8, first the inner and outer resin layers u3 un are molded, then the intermediate small foam layer u5 is molded, and then the large foam layer 1.1 is molded.
By reacting 41 (to), the small foam layer uQ can be made to have a wavy diamond shape due to its foaming pressure.

In addition, when performing wavy molding, the mold uv is used for each layer molding.
This can be done more easily by changing the number of rotations.

The large x I'L of the foam layer and the small particles can be combined arbitrarily. 4. Simple 1. Figures 1 and 2 show the conventional example, Figure 1 is a cross-sectional view of the vertical section 2 +, d V, and Figures 3 to 7.
Figure t shows a large example of the present invention, Figure 1v shows a longitudinal 11J1 side view, Figures 41-71 show a longitudinal front view, and Figure 8 shows another embodiment of the invention. Rizu main part 117
This is a diagram.

Scream...Transfer, tlll...Mold, (■...Mixture, 13 tll...Resin layer, 14) IJ (1 Enoki...
...Large bubble layer, 19uθ...Small bubble layer, (
4)...100-story 1-day Anedai Yoshi Morimoto Private use 1 Figure 2 Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] 1. A mixture is made of Ohitun resin, Kohiyaki 1 finger liquid, and multiple types of 1-ra foaming agents with different specific gravities in the northeast curve of both resin liquids. Make a difference in the curing temperature of the I# fat liquid and make a difference in the foaming temperature of each blowing agent, put this mixture into a mold, and centrifuge the layers according to the ratio If and the difference by rotating the mold. Molded,
A method for centrifugal molding of a laminate consisting of a foam layer and a resin layer, in which the heating temperature is gradually raised in this state and a reaction is caused in each h1 layer.