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Flat die for extrusion molding and film molding method

A technology of extrusion forming and film forming, which is applied in the field of flat die for extrusion forming and film forming, which can solve the problems such as the difference in moment of inertia and achieve the effect of uniform opening and improved uniformity

Active Publication Date: 2018-05-29
JAPAN STEEL WORKS LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This opening is caused by the following reason: Since the distance between the positions of the plurality of fastening bolts combined with the pair of main bodies and the discharge port is different in the center part and the outer edge part of the flat die, the tightness of the fastening bolts by each of the fastening bolts is generated. Difference in moment of inertia due to solid force

Method used

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  • Flat die for extrusion molding and film molding method
  • Flat die for extrusion molding and film molding method
  • Flat die for extrusion molding and film molding method

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Embodiment Construction

[0038]Hereinafter, specific embodiments of the present invention will be described with reference to the drawings.

[0039] figure 1 A schematic perspective view of the flat die of this embodiment is shown. figure 2 A front view of the flat die of this embodiment is shown. The flat die 1 of this embodiment is attached to an extruder for extruding a resin material in a molten state as a molten material, and is used to discharge the resin material in a film form.

[0040] Such as figure 1 as well as figure 2 As shown, the flat die 1 of this embodiment includes a die main body 5 having a slit-shaped discharge port 7 for discharging molten material in a film form, and two side surfaces perpendicular to the width direction D1 of the discharge port 7 . 8, and grooves 9 respectively provided on the side surfaces 8 and communicating with both ends of the discharge port 7 in the width direction D1.

[0041] In addition, the flat die 1 of the present embodiment is provided with...

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Abstract

The present invention provides a flat die for extrusion molding and a film forming method, which can make the opening amount uniform over the entire range of the longitudinal direction of the discharge port, and improve the uniformity of the film thickness in the width direction of the film. This flat die for extrusion molding has a die main body (5) having a slit-shaped discharge port (7) for discharging molten material, and two side surfaces intersecting the longitudinal direction of the discharge port (7). (8) Grooves (9) respectively provided on each side surface (8) and communicating with both ends in the longitudinal direction of the discharge port (7). And equipped with each side (8) of the mold body (5) respectively, and seal the groove (9) in a manner that the gap of the groove (9) can be changed in the gap direction (S) perpendicular to the longitudinal direction of the groove (9). ) of the sealing mechanism (11). The sealing mechanism (11) has a sealing member (12) arranged along the groove (9) and sealing the groove (9), a pressing member (14) pressing the sealing member (12) against the side surface (8), a supporting pressing member ( 14) A pair of first and second support members (13a, 13b) fixed to the side (8). The first support member (13a) is fixed to one end side of the side surface (8) in the gap direction (S), and the second support member (13b) is fixed to the other end side of the side surface (8) in the gap direction (S).

Description

technical field [0001] The present invention relates to a flat die for extrusion molding and a film forming method for discharging molten materials. Background technique [0002] In the molding step of extruding a film, an extruder for extruding a molten material such as a resin material melted by a melting plasticizing device is used. The extruder has piping through which the molten material to be extruded flows, and a flat die for extrusion molding (hereinafter referred to as a flat die) is connected to the end of the piping. And it has a slit-shaped discharge port for wide film discharge. [0003] Figure 8 A schematic perspective view of a conventional flat die is shown. Figure 9 shows the main part of the conventional flat die along the Figure 8 The cross-sectional view obtained by cutting along the B-B line. [0004] Such as Figure 8 As shown, a conventional flat die 101 includes a die main body 105 in which a flow path 106 for a molten material is formed. The m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C47/16B29C48/08B29C48/305B29C48/31
CPCB29C48/31B29C48/08
Inventor 岩村真上田政树
Owner JAPAN STEEL WORKS LTD