JPS5932320B2 - Manufacturing method for covers, case spines, etc. - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a novel manufacturing method for covers, case spines, etc., in which soft thermoplastic synthetic resin sheets are polymerized on both the front and back sides of a core plate, and then the front synthetic resin sheet is polymerized. A similar thermoplastic soft synthetic resin sheet or frame-shaped strip for forming a decorative edge is superposed on the upper surface, and high-frequency electrodes are applied to the entire periphery of the inward portion of the synthetic resin sheet or strip for forming a decorative edge. A simultaneous welding and cutting process is performed to weld the same area to the synthetic resin sheet on the front surface, and the inner part of this welded part is separated, and then the synthetic resin sheets on both the front and back sides and the synthetic resin sheet or strip for the decorative border are welded. The outer edges of the core plate are welded to each other by high frequency welding at the outer edge of the core plate, and the outer edge of the core plate is double bonded with the synthetic resin sheet on the surface and the outer edge of the synthetic resin sheet or strip for forming the decorative edge. The purpose is to cover the

In the illustrated embodiment, a thermoplastic soft synthetic resin sheet 2.2' is polymerized on both the front and back surfaces of the core plate 1, and a frame-shaped thermoplastic soft synthetic resin sheet is further formed on the upper surface of the front synthetic resin sheet to form a decorative border. The resin strip 3 is polymerized to form a synthetic resin strip 3 for forming a decorative edge.
Simultaneous welding and fusing process using the high-frequency electrode 4 is applied to the entire periphery of the inwardly located part, and the same part is welded to the synthetic resin sheet on the surface, and the inner part of this welded part is cut off, and then the front and back surfaces are combined. Resin sheet) 2, 2' and the outer edge of the synthetic resin sheet strip 3 for decorative edge construction are high-frequency welded to each other on the outer edge of the core plate 1, and the outer periphery of the core plate 1 is bonded to the surface composite. The resin sheet 2 and the outer edge of the synthetic resin strip 3 for forming the decorative edge are double coated.

Since the present invention is diagonal, it is of course possible to easily manufacture covers, case spines, etc. that have decorative edges on the periphery.
In particular, in the present invention, the outer periphery of the core plate is double coated with the synthetic resin sheet on the surface and the outer edge of the synthetic resin sheet or strip for forming the decorative rim, so that the round part becomes extremely strong and the core This has the effect that even if the peripheral edge of the plate receives an external impact, it will not be easily damaged.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention, and FIGS. 1 and 2 are perspective views showing the entire manufacturing process (high-frequency electrodes are omitted), FIG. 3 is a perspective view of the finished product, and FIG. 4 to 6 are sectional views of essential parts showing the manufacturing process, and FIG. 7 is a sectional view showing another embodiment and corresponding to FIGS. 5 and 6. 1... Core plate, 2, 2'... Sheet, 3
...Stripe, 4...High frequency electrode.

Claims (1)

[Claims] 1. Polymerize thermoplastic soft synthetic resin sheets on both the front and back sides of the core plate, then polymerize a similar thermoplastic soft synthetic resin sheet or a frame-shaped strip for forming a decorative rim on the upper surface of the front synthetic resin sheet, and form this decorative rim. A simultaneous welding and fusing process using a high-frequency electrode is applied to the entire periphery of the inward portion of the synthetic resin sheet or strip for welding the same portion to the surface synthetic resin sheet, and the inner portion of this welded portion is cut off. Furthermore, the synthetic resin sheets on both the front and back sides and the synthetic resin sheet I for decorative edge construction or the outer edge of the strip are high-frequency welded to each other at the outer edge of the core plate, and the outer periphery of the core plate is bonded to the surface. 1. A method for producing covers, case spines, etc., characterized in that the outer edge of the synthetic resin sheet and the synthetic resin sheet for decorative edge construction or strips are double coated.