Stretcher for sheet-like substance

Abstract

The present invention provides a drawing machine of flake capable of improving the reliability and quality of the flake. The drawing machine of flake has annular link device pair; the annular link device pair is correspondingly installed at two ends on width direction of the thermoplastic flake and leads a plurality of equal-length links along the roughly closed route on the horizontal plane; the plurality of equal-length links are connected with each other; on one hand, the equal-length links extend like a curved ruler, and on the other hand, hold each end part of the flake; the annular link device pair transports the flake to the outlet from the inlet, synchronously stretches the flake, then returns to the inlet side so as to move; wherein, in the space of transporting the flake, the stretching area for stretching the flack has heater which is installed on the upper part of the flake and radiates heat to the flake, and parts which are formed by the thermal conductivity parts heated by receiving the heat from the heater and installed on the lower part of the flake.

Description

technical field [0001] The present invention relates to an apparatus for stretching a sheet-like material such as a thermoplastic resin film. Background technique [0002] As described in Japanese Patent Application Laid-Open No. 2000-334832 (Patent Document 1), the existing simultaneous biaxial stretching machine is provided with a pair of radial bearings that support the stretching force of the sheet through guide rails. A groove is provided on the top, and the groove engages with a protrusion provided on the guide rail, and supports the link unit while supporting the self-weight of the link unit. In addition, the position of one side of the guide rail can be moved to limit the opening angle of the link device. According to this aspect, by employing a grease-sealed radial bearing, it is possible to prevent oil splashing and to perform high-speed movement without forced oil supply from the outside. In addition, by moving the position of the guide rail, the MD magnificatio...

AI Technical Summary

Problems solved by technology

[0015] That is, in the case of heating a sheet with high electromagnetic wave penetration using a heater using radiation, the radiant energy cannot be efficiently transferred to the sheet.

Moreover, when the heater is formed by connecting a plurality of heating components, according to the arrangement of these components, the radiant energy reaching the surface of the sheet is not uniform in the width direction of the sheet, resulting in heat generation on the surface of the sheet. The problems of uneven temperature and uneven tensile properties have not been considered in the above-mentioned prior art

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