T-die, liner for t-die, side sealing mechanism, sheet/film manufacturing device

Abstract

Provided are a T-die, a gasket for the T-die, a side sealing mechanism, and a sheet / film manufacturing device, which can prevent resin from leaking from the side of the T-die main body, and which can suppress the relationship with the adjustment of the gap between the lips. The extrusion (intrusion) into the flow path accompanying the deformation of the packing which becomes the main factor is hindered, and the operability is improved. The T-die has: a T-die main body in which a shoulder flow path and a lip flow path for molten resin flow are formed between the inner surfaces of the first and second blocks opposed to each other; and A side sealing mechanism that seals the side of the shoulder flow path and the side of the lip flow path on the side of the T-die main body. The side sealing mechanism includes: the flow path surface seals the side of the shoulder flow path and the side of the lip flow path. A gasket that blocks the side of the flow path of the lip; and a deformation that prevents extrusion of the gasket between the inner surface of the first module and the inner surface of the second module by allowing deformation of the gasket toward the opposite side of the flow path Anti-extrusion section.

Description

technical field [0001] The present invention relates to a T-die that expands molten resin fed from an extruder and discharges it in sheet or film form, a T-die gasket mounted on the T-die, a side sealing mechanism, and a The T-die sheet / film manufacturing device. In particular, it relates to improvements capable of preventing resin leakage from the T-die and improving the operability of the T-die. Background technique [0002] The sheet / film manufacturing apparatus has a T-die at the front end of the extruder in order to widen the molten resin press-fed from the extruder and discharge it in sheet or film form (see Patent Document 1). [0003] Here, the conventional T-die 1 will be described. [0004] figure 1 It is a figure which shows the schematic structure of the conventional T-die 1. [0005] It should be noted that the width direction of the T-die 1 is defined as the X direction, the flowing direction of the molten resin in the T-shaped die 1 is defined as the Y dir...

AI Technical Summary

Problems solved by technology

[0014] However, in the above-mentioned conventional fixing method, when the set screw 22 is pressed, the packing 19 may be deformed and pushed out (intruded) into the flow path 15, so-called extrusion (intrusion).

[0015] Therefore, when the lip gap 12 is adjusted, the operability of both ends in the width direction of the movable lip 16 may be hindered.

In particular, when the adjustment bolt 18 is operated in a direction to narrow the lip gap 12, its operability may be hindered.

[0016] This is considered to be due to the strong pressing force of the set screw 22, but if the pressing force of the set screw 22 is weak, resin leakage will occur during the molding operation.

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