TW202023791A - T-shaped die, liner for T-shaped die, side sealing mechanism, and sheet and film manufacturing device capable of improving operability by allowing the liner to deform toward the side of a back flow path surface - Google Patents

Abstract

The present invention is to provide a T-shaped die, a liner for the T-shaped die, a side sealing mechanism, and a sheet and a film manufacturing device, which can prevent resins from being leaked from a side of the T-shaped die body and can suppress the extrusion (intrusion) into the flow paths accompanied by the deformation of a liner, which is the main obstacle factor for the adjustment of the die lip gap, thereby improving the operability. The T-shaped die of the present invention includes: a T-shaped die body, in which between the inner surface of a first die block and the inner surface of a second die block facing each other, there are formed a joint surface part flow path and a die lip part flow path for allowing the molten resins to flow through; and a side sealing mechanism disposed on the side surface of the T-shaped die body for sealing the side of the joint surface part flow path and the side of the die lip part flow path. The side sealing mechanism includes a liner which allows the flow path surface to block the side of the joint surface part flow path and the side of the die lip part flow path, and an extrusion preventing part which prevents the deformation of the liner from extruding between the inner surface of the first die block and the inner surface of the second die block by allowing the liner to deform toward the side of a back flow path surface.

Description

T-shaped mold, gasket for T-shaped mold, side sealing mechanism, and sheet and film manufacturing equipment

The present invention relates to a T-die that expands molten resin sent from an extruder and ejects it in a sheet or film form, a gasket for a T-die mounted on the T-die, a side sealing mechanism, and Sheet and film manufacturing equipment using this T-die. In particular, it concerns improvements to prevent resin leakage from the T-shaped mold and improve the operability of the T-shaped mold.

The sheet and film manufacturing apparatus has a T-shaped die at the tip of the extruder in order to expand the molten resin sent from the extruder and discharge it in a sheet or film shape (see Patent Document 1).

Here, the conventional T-shaped mold 1 will be described. FIG. 1 is a schematic configuration diagram showing a conventional T-die 1. In addition, the width direction of the T mold 1 is the X direction, the flow direction of the molten resin in the T mold 1 is the Y direction, and the thickness direction of the molten resin in the T mold 1 is the Z direction, and a rectangular coordinate system is set .

The T-shaped mold 1 is configured to include a T-shaped mold body 10. In the T-shaped mold body 10, an inlet 11 for molten resin is provided on the upstream side in the flow direction (Y direction) of the molten resin. Furthermore, on the downstream side, a slit-shaped lip gap (discharge port) 12 is provided along the width direction (X direction). The supplied molten resin passes through the inlet 11 and the flow path 13 and is expanded by the manifold 14. The expanded molten resin further passes through the flow path 15 and is ejected in a sheet or film form from the lip gap 12 between the movable lip 16 and the fixed lip 17.

In the T-die 1, adjustment of the lip gap 12 is an indispensable work in order to uniformly eject the molten resin expanded by the manifold portion 14 in a sheet or film shape in the width direction. Therefore, by respectively pushing and pulling the movable lip 16 with the adjustment bolts 18 provided in the width direction, the position of the movable lip 16 relative to the fixed lip 17 is adjusted in the width direction, and the molten resin is uniformly discharged.

When the flow path 15 of the molten resin is formed inside the T-die body 10, as shown in FIG. 2, in order to prevent resin from leaking from the side 10s during the molding operation, a gasket 19 is installed on the side 10s of the T-die body 10. . In this case, the gasket 19 is screwed into the set screw 22 that is screwed to the side plate 21 and penetrates the side plate 21, and is pressed against the side surface 10s exposed on the side of the flow path 15 via the pressing plate 20. Top and fix. [Prior Technical Literature] [Patent Literature]

Patent Document 1: Japan Shikai Sho 63-170120

[The problem to be solved by the invention]

However, in the above-mentioned conventional fixing method, when the stopper screw 22 is used for pressing, the packing 19 may be deformed to cause extrusion toward the flow path 15 (intrusion), which is called extrusion (intrusion). Therefore, when adjusting the lip gap 12, 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, the operability may be hindered. This is considered to be due to the strong pressing force of the set screw 22 causing a large extruding portion, but if the pressing force of the set screw 22 is weak, resin leakage may occur during the molding operation.

The present invention is to provide a T-shaped mold, a gasket for a T-shaped mold, a side sealing mechanism, and a sheet and film manufacturing device, which can prevent the resin from leaking from the side of the T-shaped mold body, and is important for the adjustment of the lip gap , It is possible to suppress the extrusion (intrusion) into the flow path accompanied by the deformation of the gasket which is the obstruction factor, and it is possible to improve the operability. [Technical means to solve the problem]

The T-shaped mold according to the first aspect of the present invention is a T-shaped mold in which the introduced molten resin is expanded in the width direction using a manifold and is ejected in a sheet or film form from the lip gap. It has: T-shaped The mold body has a first module and a second module facing each other. Between the inner surface of the first module and the inner surface of the second module facing each other, there are formed a clamping surface flow path through which molten resin flows and The die lip flow path and the side sealing mechanism are installed on the side of the T-shaped mold body composed of the side surface of the first module and the side surface of the second module to flow the clamping surface The side of the path and the side of the flow path of the die lip are sealed; the side sealing mechanism includes a gasket and an extrusion prevention part; the gasket is formed in a thin plate shape and has a surface facing the mold clamping The flow path of the face flow path and the flow path of the mold lip, and the back flow path on the opposite side of the flow path, by making the flow path cross the side of the first module and the side of the second module, It is pressed against the side of the first module and the side of the second module so that the flow surface blocks the side of the flow path of the clamping face and the side of the flow path of the mold lip; The exit part prevents the liner from being squeezed out and deformed between the inner surface of the first module and the inner surface of the second module by allowing the liner to deform toward the backflow road side.

In addition, the T-shaped mold in the first aspect of the present invention uses a plurality of manifolds to widen the introduced molten resin in the width direction, and merge the widened molten resin in the main flow path, and then pass from the die lip The T-shaped mold with the gap in the form of a sheet or film is characterized by having: a T-shaped mold body with a first module and a second module facing each other, at least on the inner surface of the first module facing each other and the foregoing Between the inner surface of the second module, there are formed a main clamping face flow path, a mold lip flow path, and a side sealing mechanism through which the molten resin expanded by the main manifold part circulates, which are installed in : The side surface of the T-shaped mold body composed of the side surface of the first module and the side surface of the second module, at least the side of the main clamping face flow path and the side of the die lip flow path Airtight; the T-shaped mold body, which is located in the first module, is formed with: the first module side manifold and the first module side clamping face flow path; the first module side clamping face flow path is used The molten resin after the expansion of the first module side manifold is circulated, and the circulating molten resin is merged at the connection part of the main clamping face flow path and the lip flow path; and in the second In the module, there are formed: a second module side manifold and a second module side clamping face flow path; the second module side clamping face flow path is expanded by the second module side manifold part The molten resin is circulated, and the circulating molten resin is merged at the connection part of the main clamping face flow path and the die lip flow path; the side sealing mechanism includes: a gasket and an extrusion prevention part; The gasket is formed in a thin plate shape and has a flow facing the main clamping face flow path, the lip flow path, the first module side clamping face flow path, and the second module side clamping face flow path. The road surface and the back flow road surface on the opposite side to the flow road surface, by making the flow road surface straddle the side surface of the first module and the side surface of the second module, and press against the side surface of the first module. And the side of the second module, the flow path is made to connect the side of the main clamping face flow path, the side of the mold lip part flow path, the side of the first module side clamping face flow path, and the aforementioned The side of the flow path of the clamping face of the second module side is blocked; the anti-extrusion part prevents the gasket from facing the inner surface of the first module by allowing the gasket to deform toward the back flow road surface. Between the inner surfaces of the second module, and at least the inner surface of the first module and the inner surface of the second module among the first module side clamping face flow path and the second module side clamping face flow path The deformation between the extrusions.

The sheet and film manufacturing apparatus according to the second aspect of the present invention is a T-die provided with the first aspect.

The gasket for a T-shaped mold according to the third aspect of the present invention is a gasket for a T-shaped mold mounted on the side of the T-shaped mold body; the T-shaped mold body has a first module and a second module facing each other. Between the inner surface of the first module and the inner surface of the second module facing each other, there are formed a flow path for a clamping surface and a flow path for a mold lip through which molten resin flows. The molten resin is introduced by the manifold. It widens in the width direction and is ejected in a sheet or film form from the gap of the die lip; the side surface of the T-shaped mold body includes the side surface of the first module and the side surface of the second module; the liner for the T-shaped mold The mat is formed in a thin plate shape and has a flow surface facing the clamping surface flow path and the mold lip flow path, and a back flow road surface opposite to the flow road surface, by making the flow surface cross the The side surface of the first module and the side surface of the second module are pressed against the side surface of the first module and the side surface of the second module so that the flow surface will align the side of the flow path of the clamping face and the side of the mold. The side of the lip flow path is blocked, and a recess is formed on the back flow road surface.

The side sealing mechanism of the fourth aspect of the present invention is a side sealing mechanism installed on the side surface of the T-shaped mold body; the T-shaped mold body has a first module and a second module facing each other. Between the inner surface of the first module and the inner surface of the aforementioned second module, there are formed a clamping face flow path and a die lip flow path through which molten resin flows, and the introduced molten resin is expanded in the width direction by the manifold. It is wide and spit out in a sheet or film form from the gap of the die lip; the side surface of the T-shaped mold body includes the side surface of the first module and the side surface of the second module; the side sealing mechanism includes: lining The pad and the anti-extrusion part; the pad is formed in a thin plate shape and has a flow surface facing the flow path of the clamping face portion and the flow path of the mold lip portion, and a back flow surface opposite to the flow surface, By making the flow surface straddle the side surface of the first module and the side surface of the second module, and pressing against the side surface of the first module and the side surface of the second module, the flow surface is combined with the side surface of the second module. The side of the flow path of the die surface and the side of the flow path of the die lip are blocked; the anti-extrusion part prevents the liner from facing the first side by allowing the liner to deform toward the back flow road surface. The deformation between the inner surface of the module and the inner surface of the aforementioned second module. [Invention Effect]

According to the present invention, it is possible to prevent the resin from leaking from the side of the T-die body, and to adjust the lip gap, it is possible to suppress extrusion (intrusion) into the flow path accompanied by the deformation of the gasket, which is a hindrance factor. The operability of T-shaped mold is improved.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[Overview of sheet and film manufacturing apparatus 100] FIG. 3 shows the structure of a sheet and film manufacturing apparatus 100 according to an embodiment of the present invention.

The sheet and film manufacturing apparatus 100 of the present embodiment is configured to include an extruder 200, a T-die 300, a casting machine 400, a thickness gauge 500, a tractor 600, and a winding machine 700.

The extruder 200 is a device that plasticizes and extrudes the resin, melts and kneads the supplied pelletized or powdered resin to form a molten resin, and extrudes it toward the T-die 300 arranged at the tip. In addition, there are cases where additives and the like are blended into the resin supplied to the extruder 200.

The T-die 300 expands the molten resin pressure-fed from the extruder 200 and discharges the molten resin 800 into the casting machine 400 as a sheet or film.

The molten resin 800 in the form of a sheet or film is cooled and solidified by the casting machine 400 to become a sheet or film. After the thickness of the sheet or film is measured with the thickness gauge 500, trimming or the like is performed by the tractor 600, and finally wound by the winder 700.

In the sheet and film manufacturing apparatus 100 having such a structure, the T-shaped mold 300 has a characteristic structure in the mounting structure of the gasket. As described in detail below, it is configured to prevent resin leakage and use the side The extrusion prevention part of the sealing mechanism suppresses extrusion (intrusion) into the flow path due to the deformation of the gasket which is a hindrance factor for the adjustment of the lip gap, and improves the operability of the T-die 300.

In addition, in the following, the sheet and film manufacturing apparatus 100 is simply referred to as the sheet manufacturing apparatus 100, and the sheet or film is simply referred to as a sheet for description.

[About the structure of T-die 300] FIG. 4 shows the schematic structure of the T-die 300 of this embodiment. In this embodiment, in the drawings, the width direction of the T-shaped mold 300 is taken as the X direction, and the flow direction of the molten resin in the T-shaped mold 300 is taken as the Y direction. The thickness direction of the resin is referred to as the Z direction, and a rectangular coordinate system is set.

The T-shaped mold 300 is configured to include a T-shaped mold body 310 and a side sealing mechanism 320. In addition, the side sealing mechanisms 320 are respectively arranged at both ends in the width direction of the T-shaped mold body 310. However, since both mechanisms have the same structure, in FIG. 4, only the side of one end is shown. The sealing mechanism 320 and the side sealing mechanism at the other end are omitted together with a part of the T-die body 310.

[About the structure of T-die body 310] FIG. 5 shows a schematic structure of the T-shaped mold body 310. The T-die main body 310 is provided with an inlet 311 for molten resin pressure-fed from the extruder 200 at the rear end 310RE in the Y direction. Furthermore, at the tip 310TP in the Y direction, as a discharge port for discharging molten resin, a slit-shaped lip gap is provided between the movable lip 312 and the fixed lip 313 along the width direction (X direction) 314. A resin flow path RP of molten resin is formed inside the T-shaped mold body 310, and the molten resin introduced from the inlet 311 circulates in the resin flow path RP and is ejected in a sheet form from the lip gap 314.

The T-shaped mold body 310 is configured to have a first module 350 and a second module 360. The first module 350 is provided with the above-mentioned movable lip 312 at the front end of the block main body 351. A thin neck 352 is provided between the movable lip 312 and the block main body 351. In other words, the movable lip 312 is integrally connected to the block main body 351 via the thin neck portion 352. The second module 360 is integrally provided with the above-mentioned fixed lip 313 at the front end of the block main body 361.

In addition, the T-shaped mold body 310 is configured such that the first module 350 and the second module 360 are overlapped via opposing inner surfaces 350R and 360R, and are connected and fixed to each other by a plurality of bolts (not shown). In other words, the T-shaped mold body 310 is configured such that the first module 350 and the second module 360 abut the opposed inner surfaces 350R and 360R and are firmly locked to each other by a plurality of bolts not shown. In addition, the first module 350 and the second module 360 are overlapped and fixed so that the movable lip 312 and the fixed lip 313 face each other and the block main body 351 and the block main body 361 face each other.

The inner surface 350R of the first module 350 and the inner surface 360R of the second module 360 are provided with recesses (recesses, pits, grooves) for forming a gap as the resin flow path RP in an overlapped and fixed state. With this recessed portion, an introduction flow path 315 constituting a resin flow path RP of molten resin, a manifold portion 316, a clamping surface flow path 317, and a lip portion flow path 318 are formed inside the T-shaped mold main body 310.

In detail, an introduction channel 315 communicating with the introduction port 311 of the rear end 310RE is formed inside the T-shaped mold main body 310. The introduction channel 315 is a channel for introducing the molten resin fed from the introduction port 311 to the manifold portion 316. A manifold portion 316 communicating with the introduction channel 315 is formed at the tip of the introduction channel 315. The manifold portion 316 widens the introduced molten resin in the width direction (X direction).

In addition, a clamping surface flow path 317 communicating with the manifold portion 316 is formed at the tip of the manifold portion 316. The clamping surface flow path 317 is a flow path for reducing the thickness of the molten resin in the Z direction after being widened by the manifold part 316. The clamping surface flow path 317 is formed in a range from the exit of the manifold 316 to the front of the movable lip 312.

In addition, a lip portion flow path 318 communicating with the clamping face flow path 317 is formed at the tip of the clamping face flow path 317. The lip flow path 318 is a flow path for adjusting the thickness unevenness in the width direction of the molten resin, and is formed in the range of the movable lip 312. The tip of the lip flow path 318 communicates with the lip gap 314. In addition, the adjustment of uneven thickness will be described later.

Thereby, the molten resin fed from the introduction port 311 of the rear end 310RE of the T-shaped mold body 310 flows through the introduction channel 315 and is introduced into the manifold 316. After the manifold 316 is widened, the The period of circulation in the clamping face flow path 317 becomes thinner, and the thickness unevenness is adjusted while the circulation continues in the lip flow path 318, and it is ejected in a sheet form from the lip gap 314 of the tip portion 310TP of the T-shaped mold body 310 .

In the T-die 300, when the molten resin is ejected in a sheet form from the lip gap 314, the adjustment of the lip gap 314 (adjustment of the movable lip 312) is an indispensable work in order to eject the molten resin uniformly in the width direction. . The adjustment of the lip gap 314 is performed as follows: the movable lip 312 is moved by pushing and pulling the movable lip 312 by using a plurality of adjusting bolts 319 provided in the width direction of the T-shaped mold body 310 to adjust the movable mold in the width direction. The position of the lip 312 with respect to the die lip 313 is fixed so that the molten resin is uniformly discharged.

In addition, in FIGS. 4 and 5, a case where a plurality of adjustment bolts 319 are installed and the lip gap 314 is manually adjusted is shown, but there are also cases where the adjustment is automatically performed by installing a mechanism that uses thermal displacement or electric motion. Happening.

[About the structure of the side sealing mechanism 320] In the T-shaped mold 300, as shown in FIGS. 6 and 7, a side sealing mechanism 320 is attached to the side surface 310S of the T-shaped mold body 310.

The side surface 310S of the T-shaped mold body 310 is configured to include side surfaces 350S and 360S facing the X direction (width direction) of the first module 350 and the second module 360. Between the side 350S and the side 360S, the clamping face flow path 317 and the side (X direction) of the mold lip flow path 318 formed between the inner surface 350R of the first module 350 and the inner surface 360R of the second module 360 The side portion of) is opened and exposed, and the side exposed portion PE of the flow path is formed. The side sealing mechanism 320 seals the side exposed portion PE of the flow path in order to prevent the resin from leaking from the side surface 310S during the molding operation.

The side sealing mechanism 320 is composed of a gasket 321 for a T-die, a pressing member 322 (322-1, 322-2), a pair of side plates 323 (323-1, 323-2), a set screw 324, and a出部330 (Figure 7). In the following, the gasket 321 for the T-die is simply referred to as the gasket 321 for description.

The pair of side plates 323-1 and 323-2 are respectively attached to the side surface 350S of the first module 350 and the side surface 360S of the second module 360 at intervals so as to avoid the side exposed portion PE of the flow path. When installing the side plates 323-1 and 323-2, it is better to use bolts 370 to securely lock them.

In the state where the side plate 323-1 is installed on the side 350S of the first module 350 and the side plate 323-2 is installed on the side 360S of the second module 360, the side plates 323-1 and 323-2 have separate and opposite side surfaces 323-1S. , 323-2S. Furthermore, on the side plates 323-1 and 323-2, on the side opposite to the side surface 350S and the side surface 360S, there are provided convex portions 323-1T protruding from the side surfaces 323-1S and 323-2S in directions approaching each other. , 323-2T.

The gasket 321 is inserted between the side plate 323-1 and the side plate 323-2 in a state where the pair of side plates 323-1 and 323-2 are attached to the T-shaped mold body 310. In detail, it is housed by the side 350S of the first module 350 and the side 360S of the second module 360, the side 323-1S of the side plate 323-1, the side 323-2S of the side plate 323-2, and the convex portion 323-1T and In the space surrounded by the convex portion 323-2T.

The gasket 321 has a flow road surface FC11 facing the side exposed portion PE of the flow passage, and a back flow road surface FC12 on the side opposite to the flow road surface FC11. Furthermore, the gasket 321 is attached so that the flow path FC11 blocks the flow path side exposed portion PE and abuts on the side surface 350S of the first module 350 and the side surface 360S of the second module 360. In other words, the gasket 321 is installed so that the flow surface FC11 abuts across the side surface 350S and the side surface 360S and covers the side exposed portion PE of the flow path.

As the gasket 321, a heat-resistant rubber gasket such as aluminum gasket or silicon rubber formed in a flat plate shape (thin plate shape) is used.

As shown in FIG. 8, the spacer 321 is formed to be longer in the Y direction, shorter in the Z direction, and thinner in the X direction. In the gasket 321, the distance in the Y direction is represented by the length LD1 of the gasket 321, the distance in the Z direction is represented by the width TD1 of the gasket 321, and the distance in the X direction is represented by the thickness TC1 of the gasket 321. For example, as an example, the spacer 321 is formed in a thin plate shape with a length LD1 of approximately 170 mm to 200 mm, a width TD1 of approximately 20 mm to 50 mm, and a thickness of TC1 of approximately 2 to 5 mm. In addition, the front end portion 321TP is formed in a shape in which the width TD1 gradually decreases to follow the shape of the front end portion 310TP of the T-shaped mold body 310.

The pressing member 322 is configured to have a pressing plate 322-1 and a receiving plate 322-2. The pressing plate 322-1 and the receiving plate 322-2 are inserted between the side plate 323-1 and the side plate 323-2 similarly to the gasket 321.

The pressing plate 322-1 has a pressing surface FC21 that is in contact with the back flow road surface FC12 of the cushion 321 and presses the cushion 321 on the side 350S of the first module 350 and the side 360S of the second module 360, and The pressing surface FC22 on the side opposite to the pressing surface FC21 is pressed. In addition, the pressing plate 322-1 overlaps the gasket 321 so that the pressing surface FC21 abuts on the back flow road surface FC12 of the gasket 321, and is inserted between the pair of side plates 323-1 and 323-2.

The pressing plate 322-1 is made of metal such as flat (plate-shaped) carbon steel (for example, S45CP). The material of the pressing plate 322-1 preferably has higher rigidity than the material of the pad 321.

The pressing plate 322-1 is installed so as to overlap with the gasket 321, and therefore, has substantially the same surface shape as the gasket 321. That is, as shown in FIG. 9, the pressing plate 322-1 is formed to be long in the Y direction and short in the Z direction. In the X direction, the pressing plate 322-1 is formed thicker than the thickness TC1 of the spacer 321. In the pressing plate 322-1, the distance in the Y direction is represented by the length LD2 of the pressing plate 322-1, the distance in the Z direction is represented by the width TD2 of the pressing plate 322-1, and the distance in the X direction is represented by the thickness of the pressing plate 322-1 TC2 said. For example, as an example, similar to the spacer 321, the length LD2 is formed to be approximately 170 mm to 200 mm, the width TD2 is formed to be approximately 20 mm to 50 mm, and the thickness TC2 is formed to be thicker than the spacer 321 in a plate shape of approximately 5 to 10 mm. In addition, the front end portion 322TP is formed in a shape in which the width TD2 gradually decreases so as to follow the shape of the front end portion 310TP of the T-shaped mold body 310.

The receiving plate 322-2 is inserted between the convex portions 323-1T and 323-2T of the pair of side plates 323-1 and 323-2 and the pressing plate 322-1. The receiving plate 322-2 is a member for pressing the gasket 321 on the side surface 350S of the first module 350 and the side surface 360S of the second module 360 via the pressing plate 322-1.

In detail, a screw hole 322-2H penetrating in the thickness direction (X direction) is formed in the receiving plate 322-2. If the set screw 324 is screwed into the threaded hole 322-2H from the convex portion 323-1T, 323-2T side toward the pressing plate 322-1 side, the tip of the set screw 324 penetrates the receiving plate 322-2 and is pressed The pressing surface FC22 of the plate 322-1 abuts. Since the side edge portion of the receiving plate 322-2 abuts against the convex portions 323-1T and 323-2T and is locked, if the set screw 324 is further screwed, the tip of the set screw 324 presses the pressing plate 322- 1. As a result, the gasket 321 is pressed on the side 350S of the first module 350 and the side 360S of the second module 360.

The set screw 324 is installed in the Z direction so that the load center LDC is aligned with the center CTR of the side exposed portion PE of the flow path, so that the gasket 321 is evenly pressed on the side 350S of the first module 350 and the side 350S of the second module 360. On the side 360S. Furthermore, as shown in FIG. 10, in the Y direction, a plurality of set screws 324 (324-1 to 324-6) are arranged in a row at intervals.

In addition, in this embodiment, on the side surface 310S of the T-die body 310, even if the adjustment bolt 319 is used to adjust the lip gap 314 (adjustment of the movable lip 312), the manifold portion 316 and the introduction flow path 315 are formed. The state of the rear end 310RE side of the block body 351 of the first module is not changed (not deformed). Therefore, the side surface 310S is sealed by a member other than the gasket 321. In the foregoing description, the values of the length LD1 of the gasket 321 and the length LD2 of the pressing plate 322-1 indicate that the gasket 321 blocks the flow path side exposed portion PE of the clamping face flow path 317 and the mold lip flow path 318 An example below.

[About the structure of the extrusion prevention part 330] The side sealing mechanism 320 is provided with an extrusion prevention part 330 (FIGS. 7 and 9 ). The extrusion prevention part 330 is constituted by a recess 331 provided on the pressing surface FC21 of the pressing plate 322-1.

Here, when the pressing surface FC21 of the pressing plate 322-1 is not formed with the extrusion prevention portion 330, when the gasket 321 is pressed by the set screw 324, the back flow road surface FC12 of the gasket 321 is pressed The surface FC21 restricts and suppresses the deformation of the back flow road surface FC12. Therefore, the flow road surface FC11 of the liner 321 may be extruded (intruded) into the clamping face flow path 317 and the die lip flow path 318 (intrusion). ). Therefore, when adjusting the lip gap 314, the operability of both ends in the width direction (X direction) of the movable lip 312 may be hindered. In particular, when the adjustment bolt 319 is operated in a direction to narrow the lip gap 314, the operability may be hindered. In order to suppress the extrusion (intrusion) of the flow surface FC11 of the gasket 321, if the pressing force of the stop screw 324 is weakened, resin leakage may occur during the molding operation. Therefore, it is necessary to use the stop screw 324 to apply a predetermined pressure. The tight force strongly presses the pad 321.

Therefore, in the side sealing mechanism 320, as described above, the depression 331 is provided on the pressing surface FC21 of the pressing plate 322-1 to prevent resin from leaking from the side surface 310S of the T-die body 310 during the molding operation. In addition, the flow surface FC11 of the gasket 321 is suppressed from extruding (intruding) deformation to the clamping surface flow path 317 and the die lip flow path 318, and the operability of the T-die is improved. In addition, the so-called deformation (intrusion) of the flow surface FC11 of the gasket 321 against the clamping face flow passage 317 and the die lip flow passage 318 means that the flow surface FC11 of the gasket 321 is opposed to the first module 350. Between the inner surface 350R of the second module 360 and the inner surface 360R of the second module 360 by extrusion (intrusion).

The recessed portion 331 as the extrusion prevention portion 330 is formed on the pressing surface FC21 of the pressing plate 322-1 that abuts against the backflow road surface FC12 of the gasket 321 in accordance with the shape of the flow path side exposed portion PE. With the pressing surface FC21 of the pressing plate 322-1 in contact with the back flow road surface FC12 of the pad 321, a space SPC is formed in the recess of the recess 331.

The recessed portion 331 of the pressing surface FC21 is constituted by a groove portion 332 provided by cutting the portion of the pressing surface FC21. The groove portion 332 is arranged such that the center line CTR in the Z direction coincides with the flow path side exposed portion PE, and in the X direction, it faces the flow path side exposed portion PE with the spacer 321 interposed therebetween.

The length LD21 of the groove 332 in the Y direction is set to be about 80 mm to 100 mm from the front end 322TP of the pressing plate 322-1 toward the rear end, compared to the distance from the front end 310TP of the T-die body 310 to the first module The distance between the base of the thin neck portion 352 of 350 (the bending base of the movable lip 312) has a margin of about 5 mm. In addition, the base portion of the neck portion 352 refers to an end portion on the rear end portion 310RE side of the neck portion 352 extending in the Y direction, and is a connecting portion connected to the block main body 351.

The width TD21 in the Z direction of the groove portion 332 is the reference width WPE in the Z direction relative to the side exposed portion PE of the flow path. It is better to set 0.5mm~2mm wider on both sides, and more preferably on both sides Set 1mm each wider. In addition, the reference width WPE of the channel side exposed portion PE in the Z direction refers to the width of the channel side exposed portion PE in the Z direction in the initial state before the adjustment of the lip gap 314 is adjusted by the adjustment bolt 319. In addition, the depth DP21 of the groove 332 in the X direction is preferably set in the range of 0.5 mm to 2.0 mm.

[Regarding the effect of one embodiment] According to the structure of the present embodiment, the pressing surface FC21 of the pressing plate 322-1 that presses the gasket 321 on the side 350S of the first module 350 and the side 360S of the second module 360 is provided as an extrusion preventing part 330. Therefore, the portion PE is exposed on the side of the flow path to form an allowable space SPC that allows the gasket 321 to deform toward the backflow road surface FC12. During the molding operation, by the resin pressure of the molten resin circulating in the resin flow path RP, although the pressure toward the back flow road surface FC12 is applied to the gasket 321, the pressure generated by the pressure can be unrestricted. The deformation of the back flow road surface FC12 side of the gasket 321 is accommodated in the space SPC. Therefore, it is possible to prevent the resin from leaking from the side surface 310S of the T-shaped mold body 310, and to adjust the lip gap 314 to suppress (prevent) the deformation of the gasket 321 that is a hindrance factor to the flow path 317 (318). Extrusion (intrusion) improves the operability of the T-die 300. In addition, the bottom surface of the groove portion 322 (recessed portion 331) serves as a receiving surface that prevents excessive deformation of the packing 321.

In addition, by comparing the width TD21 of the groove portion 332 (recessed portion 331) to the reference width WPE of the side exposed portion PE of the flow path, it is preferable to set a width of 0.5 mm to 2 mm on both sides, and more preferably between two The sides are set to be 1 mm wide, so that the gasket 321 can be easily deformed toward the opposite side of the flow path when the resin pressure is applied. In other words, with the reference width WPE of the side exposed portion PE of the flow path, the margin width of the groove 332 is set to be 0.5mm~2mm wide on both sides, and more preferably set to be wide on both sides. Each setting is 1 mm, so that the gasket 321 can be easily deformed toward the back flow road surface FC12 when the resin pressure is applied. Thereby, it is possible to reliably suppress extrusion (intrusion) into the flow path accompanying the deformation of the gasket, and further improve the operability of the T-die.

When the gasket 321 is installed, the margin width of the groove 332 (recess 331) is also set to be 0.5mm~2mm wide on both sides, and preferably set to 1mm wide on both sides. When the pressing plate 322-1 is pressed tightly, the gasket 321 is easily deformed toward the back flow road surface FC12 side, and the extrusion (intrusion) into the flow path is suppressed or alleviated, so adjustment before production operation becomes easy. Moreover, when the margin width is narrower than 0.5 mm, the ease of deformation of the pad 321 toward the back flow road surface FC12 side is reduced, and accordingly, the deformation toward the flow road surface FC12 side may become larger. When the margin width is wider than 2.0 mm, during the molding operation, molten resin may enter between the flow surface FC11 of the gasket 321 and the side surface 350S of the first module 350 and the side surface 360S of the second module 360.

[Empirical test on the effect of an embodiment] The side sealing mechanism 320 provided with the pressing plate 332-1 without the groove portion 332 and the side sealing mechanism 320 with the pressing plate 332-1 provided with the groove portion 332 are prepared. In other words, the side sealing mechanism 320 of "there is no groove on the pressing plate" of the conventional article and the side sealing mechanism 320 of "the groove on the pressing plate" of the present invention are prepared. Next, these two side sealing mechanisms 320 are mounted on one side surface 310S and the other side surface 310S of the T-shaped mold body 310. Then, using the sheet manufacturing apparatus 100 (testing device) in which the T-shaped mold 300 was set, a sheet manufacturing test was performed using polypropylene resin as a raw material.

The dimensions of the pressing plate 332-1 provided with the groove portion 332 are as follows. The length of the pressing plate LD2: 175mm The width of the pressing plate TD2: 30mm The thickness of the pressing plate TC2: 8mm The length of the groove LD21: 90mm The width of the groove TD21: 6mm Allowable width of the groove: 1mm on both sides The depth of the groove DP21: 1mm

Although the sheet manufacturing test was carried out for 15 hours, from the side surface 310S where the side sealing mechanism 320 with "the pressing plate has a groove" and the side sealing mechanism 320 with the "no groove on the pressing plate" installed No resin leakage occurred on the side 310S.

However, during the sheet manufacturing test, the adjustment of the lip gap 314 (adjustment of the movable lip 312) is performed, and when the lip gap 314 is narrowed, the side sealing mechanism is located at "there is no groove on the pressing plate" The rotation of the adjustment bolt 319 at the end on the 320 side is not smooth. On the other hand, the rotation of the adjustment bolt 319 at the end on the side sealing mechanism 320 where "the pressing plate has a groove" is smooth.

In addition, after the sheet manufacturing test was completed, the state of the aluminum gasket set in each side sealing mechanism 320 was investigated. FIG. 11(A) is a diagram schematically showing the deformed state of the gasket 321 of the side sealing mechanism 320 set to "there is no groove on the pressing plate" as a comparative example. 11(B) is a diagram schematically showing the deformed state of the gasket 321 set in the side sealing mechanism 320 which is "a groove on the pressing plate" of the present invention.

12 is a diagram showing a measurement curve obtained by actually measuring the displacement of the flow surface FC11 of the pad 321 in the comparative example. FIG. 13 is a diagram showing a measurement curve obtained by actually measuring the displacement of the flow surface FC11 of the pad 321 in the present invention. FIG. 14 is a diagram showing a measurement curve obtained by actually measuring the displacement of the back flow road surface FC12 of the pad 321 in the present invention.

According to FIG. 11(A) and FIG. 12, in the comparative example using the side sealing mechanism 320 "there is no groove on the pressing plate", a large extrusion (intrusion) occurs on the flow surface FC11 of the pad 321 This situation is confirmed. In contrast to this, by applying the side sealing mechanism 320 as the "slot on the pressing plate" of the present invention, as shown in FIG. 11(B) and FIG. 13, the flow surface FC11 of the gasket 321 is extruded (Intrusion) is eliminated, and as shown in FIG. 11(B) and FIG. 13, a depression is observed on the flow road surface FC11. Furthermore, by applying the present invention, as shown in FIG. 11(B) and FIG. 14, the deformation of the pad 321 toward the back flow road surface FC12 side is confirmed. This is considered to be related to suppression of extrusion (intrusion) of the gasket that should be squeezed out (invaded) into the flow path 317 (318).

As described above, by forming the groove portion 332 (recess 331) on the pressing plate 322-1, as a result, the gasket 321 is deformed toward the back flow road surface FC12, and the gasket 321 is extruded into the flow path 317 (318). (Intrusion) is eliminated, and the adjustment bolt 319 when adjusting the lip gap 314 is also rotated smoothly, and it can be seen that the operability of the T-die 300 is improved. In addition, the sheet manufacturing test may be operated without resin leakage. As a result, it was confirmed that the above-mentioned effects can be obtained by using the T-shaped mold 300 equipped with the side sealing mechanism 320 of the present invention with "a groove on the pressing plate".

[Modifications of Extrusion Prevention Section 330] In the above-mentioned embodiment, the extrusion preventing part 330 is provided on the pressing surface FC21 of the pressing plate 322-1, but instead of the above structure, the extrusion preventing part 330 may be provided on the backflow road surface FC12 of the gasket 321. As shown in FIGS. 15-17, the extrusion prevention part 330 of this modification is formed in the backflow road surface FC12 of the gasket 321, and the pressing surface FC21 of the pressing plate 322-1 is formed in a plane. The back flow road surface FC12 of the pad 321 is provided with a groove portion 332 (recessed portion 331) having a length LD11, a width TD11, and a depth DP11 as the extrusion prevention portion 330. In addition, the length LD11, the width TD11, and the depth DP11 are the same dimensions as the length LD21, the width TD21, and the depth DP21, respectively. Thereby, even in the conventional T-die, the extrusion prevention part 330 can be formed without replacing the pressing plate.

Moreover, as shown in FIG. 18, the extrusion prevention part 330 may be provided in both the pressing plate 322-1 and the packing 321. In addition, in the above-mentioned embodiment, the depression 331 (groove 332) is provided by cutting the pressing surface FC21, but as shown in FIG. 19, three divided pressing plate pieces 322-1, 322 may be used. -12, 322-13, the narrow pressing plates 322-11 and 322-12 are overlapped on both sides of the wide pressing plate 322-13 to form a recess 331.

[Modification of the arrangement of the set screw 324] In the above-mentioned embodiment, the set screw 324 is attached so that the load center LDC in the Z direction coincides with the center CTR of the side exposed portion PE of the flow path. However, the above structure may be replaced by the side of the flow path in the Z direction. The center part CTR of the part PE is exposed, and the set screw 324 is attached to two places. As shown in FIG. 20, the set screws 324 of this modification are respectively attached to positions where the load center LDC is offset in the Z direction from the center CTR of the side exposed portion PE of the flow path, such as the periphery of the shoulder of the groove 332 (so-called Around the embankment). As a result, in the Z direction, the pressing force can be adjusted at two locations and the pressing can be performed more uniformly.

Furthermore, as shown in FIG. 21, in the Y direction, a plurality of set screws 324 (324-21 to 324-112) are arranged in two rows at intervals. In addition, as shown in FIG. 22, in the Y direction, a plurality of set screws 324 (324-21 to 324-112) may be arranged in a staggered shape (saw-tooth shape) at intervals.

[Modification of side plate 323] In the above-mentioned embodiment, the side plate 323 uses a pair of side plates 323-1 and 323-2, but instead of the above structure, an integrated side plate 323 may be used. As shown in FIG. 23, in the integrated side plate 323, the recessed part 323F which accommodates the packing 321 and the pressing member 322 (pressing plate 322-1) is formed in the position of the side exposed part PE of a flow path. The thin-walled portion 323G of the side plate 323 that is thinned by forming the recessed portion 323F is provided with a screw hole 323H through which the set screw 324 is screwed.

Furthermore, by screwing the stop screw 324 from the thin-walled portion 323G, the gasket 321 is pressed on the side surface 350S of the first module 350 and the side surface 360S of the second module 360 via the pressing member 322 (pressing plate 322-1) . Thus, the packing 321 can be compressed without using the receiving plate 322-2.

[Other modifications] Fig. 24 shows a schematic structure of a multi-manifold-type T-die main body according to a modification of the present invention. 25 is a partially cutaway perspective view showing the schematic structure of the multi-manifold-type T-die main body and the side sealing mechanism according to a modification of the present invention.

In the above-mentioned embodiment, it is constituted as a single-layer type T-shaped mold 300 in which two modules (the first module 350 and the second module 360) are overlapped in the T-shaped mold body 310 The two divided molds are formed to form a main manifold at the overlapping portion. Between the inner surface 350R of the first module 350 and the inner surface 530R of the second module 360, a main manifold 316 is formed to widen The main clamping surface flow path 317 and the lip flow path 318 through which the subsequent molten resin flows. However, instead of the single-layer type T-shaped mold, the following multi-manifold-type T-shaped mold may be formed. In the multi-manifold-type T-shaped mold, in addition to the inner surface 350R and the first module 350 In addition to the main manifold portion 316 formed between the inner surfaces 530R of the two modules 360, there are also a first module side manifold portion 3161 and a second module side manifold portion 3162.

In the multi-manifold type T-shaped mold 300A, as shown in FIG. 24, the T-shaped mold body 310A is the same as the case of the single-layer type in FIG. 5, and the first module 350A and the second module 360A pass through opposite inner surfaces 350R. , 360R is overlapped, and it is constituted by connecting and fixing a plurality of bolts not shown. In other words, the T-shaped mold body 310A is configured such that the first module 350A and the second module 360A abut the opposed inner surfaces 350R and 360R, and are firmly locked to each other by a plurality of bolts not shown. In addition, the first module 350A and the second module 360A are overlapped and fixed so that the movable lip 312 and the fixed lip 313 face each other and the block main body 351A and the block main body 361A face each other.

The inner surface 350R of the first module 350A and the inner surface 360R of the second module 360A are provided with recesses (recesses, pits, grooves) for forming a gap as the main resin flow path RPM in an overlapped and fixed state. With this recessed portion, a main introduction flow path 315M constituting a main resin flow path RPM of molten resin, a main manifold portion 316M, a main clamping surface flow path 317M, and a mold lip flow path are formed inside the T-shaped mold body 310A 318.

In detail, a main introduction flow path 315M communicating with the main inlet 311M of the rear end 310RE is formed in the inner center of the T-shaped mold main body 310A. The main introduction flow path 315M is a flow path for introducing the molten resin fed from the main inlet 311M to the main manifold portion 316M. A main manifold portion 316M communicating with the main introduction channel 315M is formed at the front end of the main introduction channel 315M. The main manifold part 316M widens the introduced molten resin in the width direction (X direction).

In addition, a main clamping surface flow path 317M communicating with the main manifold 316M is formed at the front end of the main manifold 316M. The main clamping surface flow path 317M is a flow path for reducing the thickness of the molten resin in the Z direction after being widened by the main manifold 316M. The main clamping face flow path 317M is formed in a range from the outlet of the main manifold portion 316M to the connection part CN connected to the lip flow path 318.

In addition, a first module side clamping surface flow path 3171 is connected to the connection part CN of the main clamping face flow path 317M and the lip flow path 318. The first module side clamping face flow path 3171 allows The molten resin after the expansion of the module side manifold portion 3161 flows, and the circulating molten resin merges with the connection part CN of the main clamping face flow path 317M and the die lip flow path 318, and the second module side clamping is connected. The face flow path 3172, the second module side clamping face flow path 3172 allows the molten resin expanded by the second module side manifold portion 3162 to circulate, and the circulating molten resin and the main clamping face flow path 317M and The connection part CN of the lip part flow path 318 merges.

In addition, a lip portion flow path 318 that communicates with the main clamping face portion flow path 317M via the connection part CN is formed at the tip of the main clamping face portion flow path 317M. The lip flow path 318 is a flow path for adjusting the thickness unevenness of the molten resin in the width direction, and is formed in the range of the movable lip 312, the neck portion 352, and the like. The tip of the lip flow path 318 communicates with the lip gap 314.

Also, in the T-shaped mold body 310A, the first module 350A is formed with: a first module side introduction flow path 3151 constituting a first module side resin flow path RP1 of molten resin; a first module side manifold portion 3161; And the first module that circulates the molten resin expanded by the first module side manifold portion 3161 and merges the circulating molten resin with the main clamping face flow path 317M and the connection portion CN of the die lip flow path 318 Side clamping face flow path 3171.

In detail, a first module side introduction flow path 3151 communicating with the first module side introduction port 3111 of the rear end 310RE is formed on the first module side of the T-shaped mold body 310A. The first module side introduction channel 3151 is a channel for introducing the molten resin fed from the first module side introduction port 3111 to the first module side manifold portion 3161. A first module side manifold part 3161 communicating with the first module side introduction flow path 3151 is formed at the tip of the first module side introduction flow path 3151. The first module side manifold portion 3161 expands the introduced molten resin in the width direction (X direction).

In addition, a first module side clamping surface flow path 3171 communicating with the first module side manifold portion 3161 is formed at the tip of the first module side manifold portion 3161. The first module side clamping surface flow path 3171 is a flow path for reducing the thickness of the molten resin in the Z direction after being widened by the first module side manifold portion 3161. The first module side clamping surface flow path 3171 is composed of a flat portion 31711 and an inclined portion 31712. The flat portion 31711 causes the molten resin expanded by the first module side manifold portion 3161 to move in the Y direction (T-shaped mold body 310A). The flow direction of the molten resin) to flow a predetermined distance, the aforementioned inclined portion 31712 in order to transport the molten resin from the tip of the flat portion 31711 to the connecting portion CN of the main clamping face flow path 317M and the die lip flow path 318 and make the The connecting portion CN merges and is formed obliquely downward and obliquely forward to the left in FIG. 24.

In addition, in the T-shaped mold body 310A, the second module 360A is formed with: a second module side introduction flow path 3152 constituting a second module side resin flow path RP2 of molten resin; a second module side manifold portion 3162; And the second module that circulates the molten resin expanded by the second module side manifold portion 3162 and merges the circulating molten resin with the connection portion CN of the main clamping face flow path 317M and the die lip flow path 318 Side clamping face flow path 3172.

Specifically, the second module side introduction flow path 3152 communicating with the second module side introduction port 3112 of the rear end 310RE is formed on the second module side of the T-shaped mold body 310A. The second module side introduction channel 3152 is a channel for introducing the molten resin fed from the second module side introduction port 3112 to the second module side manifold portion 3162. A second module side manifold portion 3162 communicating with the second module side introduction flow path 3152 is formed at the tip of the second module side introduction flow path 3152. The second module side manifold portion 3162 widens the introduced molten resin in the width direction (X direction).

In addition, a second module side clamping surface flow path 3172 communicating with the second module side manifold portion 3162 is formed at the tip of the second module side manifold portion 3162. The second module side clamping surface flow path 3172 is a flow path for reducing the thickness of the molten resin in the Z direction after being widened by the second module side manifold portion 3162. The second module side clamping face flow path 3172 is composed of a flat portion 31721 and an inclined portion 31722. The flat portion 31721 allows the molten resin expanded by the second module side manifold portion 3162 to circulate a predetermined distance in the Y direction. The portion 31722 is formed obliquely upward in order to transport molten resin from the tip of the flat portion 31721 to the connecting portion CN of the main clamping surface flow path 317M and the lip portion flow path 318 and to merge with the connecting portion CN. Left diagonally forward.

In this way, a first module side clamping surface flow path 3171 is connected to the connection part CN of the main clamping face flow path 317M and the lip flow path 318. The first module side clamping face flow path 3171 allows The molten resin after the expansion of the module side manifold portion 3161 flows, and the circulating molten resin merges with the connection part CN of the main clamping face flow path 317M and the die lip flow path 318, and the second module side clamping is connected. The face flow path 3172, the second module side clamping face flow path 3172 allows the molten resin expanded by the second module side manifold portion 3162 to circulate, and the circulating molten resin and the main clamping face flow path 317M and The connection part CN of the lip part flow path 318 merges.

FIG. 26 shows a first schematic configuration example of the pressing plate arranged in the side sealing mechanism of the modification of the present invention. FIG. 27 shows a second schematic configuration example of the pressing plate arranged in the side sealing mechanism of the modification of the present invention. The structure of FIG. 26 differs from the structure of FIG. 27 only in that it is formed corresponding to the first module side mold clamping face flow path 3171 and the second module side mold clamping face flow path 3172 as the recessed portion of the extrusion prevention portion 330A The end shape of the flat part. Specifically, in the structure of FIG. 26, the end of the recess is formed in a linear shape, but in the structure of FIG. 27, the end of the recess is formed in a stepped shape.

In this modified example, the shape of the side sealing mechanism 320A is different, but it has basically the same functions as the aforementioned gasket and the extrusion prevention part. That is, the side sealing mechanism 320A has a gasket, not shown, which is formed in a thin plate shape and has a flow path 317M facing the main clamping face portion, a lip flow path 318, and a first module side clamping face flow path 3171 And the flow road surface (FC11) of the flow path 3172 on the second module side clamping surface, and the back flow road surface (FC12) on the side opposite to the flow road surface (FC11), the gasket is compressed so that the flow road crosses the first The side of the module 350A abuts the side of the second module 360A, so that the flow surface (FC11) connects the side of the main clamping face flow path 317M, the side of the mold lip flow path 318, and the first module side clamping face The side of the flow path 3171 and the side of the second module side clamping surface flow path 3172 are blocked. In addition, the side sealing mechanism 320A has an extrusion prevention portion 330A that allows the gasket to deform toward the back flow road surface (FC12) side, thereby preventing the gasket from moving toward the inner surface and the first module 350A. The deformation between the inner surfaces of the two modules 360A, the first module side clamping surface flow path 3171 and the second module side clamping surface flow path 3172 is extruded. In particular, it has an extrusion preventing part 330A that prevents the gasket from being deformed between the inner surface of the first module 350A and the inner surface of the second module 360A, especially the die lip flow path 318.

In this way, the side sealing mechanism 320A is provided with the extrusion prevention part 330A. The extrusion preventing portion 330A is composed of a recess 331A provided on the pressing surface FC21A of the pressing plate 322-1A.

The recessed portion 331A of the extrusion prevention portion 330A is connected to the side exposed portion PE of the flow path, that is, the side of the main clamping face flow path 317M, the mold lip flow path 318, the first module side clamping face flow path 3171, and the second The module-side clamping face flow path 3172 is formed on the pressing surface FC21A of the pressing plate 322-1A facing the back flow road surface (FC12) of the gasket (321) to match the shape. Then, in a state where the pressing surface 322-1A of the pressing plate 322-1A abuts against the backflow road surface of the pad, a space SPC is formed in the recess of the recess 331A.

As with the above-mentioned T-die 300, by applying the side sealing mechanism 320A as the "slot on the pressing plate" of the present invention, if it is associated with FIG. 11(B) and FIG. 13, the pad 321 The extrusion (intrusion) of the flow road surface FC11 is eliminated, and as shown in FIG. 11(B) and FIG. 13, a depression is observed on the flow road surface FC11. Furthermore, by applying the modification of the present invention, the deformation of the liner 321 to the side of the backflow road surface FC12 is confirmed if it is related to FIGS. 11(B) and 14. As described above, this is considered to be related to the suppression of the extrusion (intrusion) of the gasket that should be extruded (intruded) into the die lip flow path 318.

As described above, by forming the recess 331A as a groove on the pressing plate 322-1A, as a result, the gasket is deformed toward the back flow road surface FC12, and the extrusion (intrusion) of the gasket into the die lip flow path 318 is prevented. Elimination, the adjustment bolt 319 when adjusting the lip gap 314 also rotates smoothly, and the operability of the T-die 300A is improved. In addition, since there is no intrusion of the liner, the liner can also be prevented from being in a state that does not easily fall off, and replacement of the liner does not become complicated, and there is an advantage that the replacement of the liner becomes easy.

Fig. 28 is a perspective view showing another schematic structure of a multi-manifold-type T-shaped mold body according to a modification of the present invention.

In the T-die 300 and 300A described above, the adjustment of the lip gap 314 is performed as follows: the movable die lip 312 is pushed and pulled by a plurality of adjustment bolts 319 provided in the width direction of the T-die main body 310 to make the movable die The lip 312 moves to adjust the position of the movable lip 312 relative to the fixed lip 313 in the width direction, thereby uniformly discharging the molten resin. In the modified example of FIG. 28, in addition to adjusting the position of the movable lip 312 relative to the fixed lip 313 in the width direction, it is also possible to use a plurality of T-shaped mold body 310B provided in the width direction. The adjusting bolt 3191 and the throttle rod 381 for adjusting the flow rate adjust the thickness of the flat portion 31711 of the first module side clamping face flow path 3171 in the width direction, respectively, and use the T-shaped mold body 310B in the width direction. The respective adjustment bolts 3192 and the flow rate adjustment throttle rod 382 adjust the thickness of the flat portion 31721 of the second module side clamping surface flow path 3172 in the width direction. The throttle lever includes a vertical throttle lever and an inclined throttle lever. The vertical throttle lever is illustrated in FIG. 28.

As a result, the molten resin is further adjusted to flow without thickness unevenness, and the molten resin can be discharged more uniformly.

In the modified example of FIG. 28, as described above, corresponding to the flat portion 31711 of the first module side clamping surface flow path 3171 and the flat portion 31721 of the second module side clamping surface flow path 3172, there is a cushion preventing The extruding part 330A prevents the deformation of the flat parts 31711 and 31721 extruding. More specifically, by forming the concave portion 331A as a groove on the pressing plate 322-1A, the gasket is deformed toward the backflow road surface FC12, and the extrusion (intrusion) of the gasket into the flat portions 31711 and 31721 is prevented. If this is eliminated, the adjustment bolt 3192 when adjusting the thickness of the flat portions 31711 and 31721 also rotates smoothly, and the operability of the T-die 300B can be improved. In addition, since there is no intrusion of the liner, the liner can also be prevented from being in a state that does not easily fall off, and replacement of the liner does not become complicated, and there is an advantage that the replacement of the liner becomes easy.

[Other other modifications] In the above embodiment, the T-shaped mold body 310 is formed as two divided molds formed by overlapping two modules (the first module 350 and the second module 360). However, the T-shaped mold body 310 may be replaced with the above structure. It is formed into three divided molds composed of three parts. In the case of three divided molds, the T-shaped mold body 310 is configured to have a mold base formed with an introduction port, an introduction flow path, and a manifold, and are respectively mounted on the mold base to form a clamping face flow path 317 and a mold lip. Two modules of the flow path 318. The first module 350 and the second module 360 can also be applied to these two modules. In addition, in the above-mentioned embodiment, the T-shaped mold 300 is a single-layer mold for manufacturing a single-layer sheet, but instead of the above structure, the T-shaped mold 300 may be formed as a multilayer mold (multi-manifold mold) for manufacturing a multilayer sheet.

It should be understood that the embodiments and examples disclosed this time are illustrative and not restrictive in all respects. The scope of the present invention is defined not by the above description but by the scope of the patent application, and is intended to include the meaning equivalent to the scope of the patent application and all changes within the scope.

100: Sheet and film manufacturing equipment 300, 300A, 300B: T-shaped mold 310, 310A, 310B: T-shaped mold body 310S: The side of T-shaped mold body 310 312: movable die lip 313: fixed die lip 314: Die lip gap 316: Manifold 317: Clamping face flow path 318: Mould Lip Flow Path 316M: Main manifold 317M: Main clamping face flow path 3171: First module side clamping face flow path 31711: flat part 31712: Inclined part 3172: Second module side clamping face flow path 31721: flat part 31722: inclined part 320, 320A: side airtight mechanism 321: Liner 322: Pressing parts 322-1, 322-1A: Press plate 322-2: Bearing plate 322-2H: threaded hole 323 (323-1, 323-2): side panel 323-1S: the side of the side plate 323-1 323-1T, 323-2T: convex part 323-2S: the side of the side plate 323-2 324: Stop Screw 330, 330A: Prevent extrusion part 331, 331A: recess 332: Groove 350, 350A: first module 350R: the inner surface of the first module 350 350S: The side of the first module 350 facing the X direction 360, 360A: second module 360R: the inner surface of the second module 360 360S: the side of the second module 360 facing the X direction 370: Bolt CTR: Central FC11: Flow Road FC12: Backstream pavement FC21: Pushing surface FC22: Push the opposite side LDC: Load Center PE: Exposed side of the flow path SPC: Space WPE: base width

Fig. 1 is a side cross-sectional view showing the schematic structure of a conventional T-die. Fig. 2 is a diagram showing the mounting structure of a gasket of a conventional T-die. Fig. 3 is a schematic configuration diagram showing a sheet and film manufacturing apparatus according to an embodiment of the present invention. Fig. 4 is a partially broken perspective view showing a schematic structure of a T-die according to an embodiment of the present invention. Fig. 5 is a side cross-sectional view showing the schematic structure of the T-die body. Fig. 6 is an exploded perspective view showing a partially cutaway side sealing mechanism. Fig. 7 is a diagram showing the mounting structure of the gasket and the pressing plate in the side sealing mechanism. 8(A) and (B) are schematic structural diagrams showing a gasket arranged in a side sealing mechanism. 9(A) and (B) are schematic structural diagrams showing the pressing plate arranged on the side sealing mechanism. Fig. 10 is an arrangement diagram showing a set screw in a side sealing mechanism. Figure 11 (A), (B) is a schematic representation of the side sealing mechanism "there is no groove on the pressing plate" as a comparative example, and the side that will be the "slot on the pressing plate" of the present invention A diagram of the extrusion (intrusion) state of the gasket when the square sealing mechanism is assembled in the T-die and the sheet manufacturing test is performed. Fig. 12 is a graph showing the measurement of the displacement of the flow surface of the pad in the comparative example. Fig. 13 is a graph showing the measurement of the displacement of the flow surface of the pad in the present invention. Fig. 14 is a graph showing the measurement of the displacement of the back flow road surface of the pad in the present invention. Fig. 15 is a diagram showing a mounting structure of a gasket and a pressing plate according to a modification of the present invention. Fig. 16 (A) and (B) are schematic structural diagrams showing a gasket of a modification of the present invention. 17(A) and (B) are schematic structural diagrams showing a pressing plate according to a modification of the present invention. Fig. 18 is a diagram showing a mounting structure of a gasket and a pressing plate according to a modification of the present invention. Fig. 19 is a diagram showing a mounting structure of a gasket and a pressing plate according to a modification of the present invention. Fig. 20 is an arrangement diagram showing a set screw according to a modification of the present invention. Fig. 21 is a layout diagram showing a set screw according to a modification of the present invention. Fig. 22 is an arrangement diagram showing a set screw according to a modification of the present invention. Fig. 23 is a schematic configuration diagram showing a side plate of a modification of the present invention. Fig. 24 is a schematic configuration diagram of a multi-manifold type T-shaped mold main body showing a modification of the present invention. 25 is an exploded and partially cut-away perspective view showing the schematic structure of a multi-manifold-type T-die main body and a side sealing mechanism according to a modification of the present invention. 26(A) and (B) are diagrams showing a configuration example of a grooved pressing plate of a side sealing mechanism for a multi-manifold type T-die body according to a modification of the present invention. 27(A) and (B) are diagrams showing other structural examples of the grooved pressing plate of the side sealing mechanism for a multi-manifold type T-die body according to a modification of the present invention. Fig. 28 is a perspective view showing another schematic configuration of a multi-manifold-type T-shaped mold body according to a modification of the present invention.

310: T-shaped mold body

310S: The side of T-shaped mold body 310

317: Clamping face flow path

318: Mould Lip Flow Path

320: Side airtight mechanism

321: Liner

322: Pressing parts

322-1: Press plate

322-2: Bearing plate

322-2H: threaded hole

323 (323-1, 323-2): side panel

323-1S: the side of the side plate 323-1

323-1T, 323-2T: convex part

323-2S: the side of the side plate 323-2

324: Stop Screw

330: Prevent extrusion

331: Concave

332: Groove

350: The first module

350R: the inner surface of the first module 350

350S: The side of the first module 350 facing the X direction

360: second module

360R: the inner surface of the second module 360

360S: the side of the second module 360 facing the X direction

370: Bolt

CTR: Central

FC11: Flow Road

FC12: Backstream pavement

FC21: Pushing surface

FC22: Push the opposite side

LDC: Load Center

PE: Exposed side of the flow path

SPC: Space

WPE: base width

Claims (17)

A T-shaped mold is a T-shaped mold that uses a manifold to expand the introduced molten resin in the width direction and ejects it in a sheet or film form from the gap between the lips. It is characterized by: The T-shaped mold body has a first module and a second module facing each other. Between the inner surface of the first module and the inner surface of the second module facing each other, a parting surface flow for molten resin to flow is formed Road and mold lip flow path, and The side sealing mechanism is installed on the side surface of the T-shaped mold body composed of the side surface of the first module and the side surface of the second module, and is used to connect the side of the clamping surface flow path and the mold Seal the side of the lip flow path; The aforementioned side sealing mechanism includes: a gasket and an extrusion prevention part; The liner is formed in a thin plate shape, and has a flow surface facing the flow path of the clamping surface and the flow path of the mold lip, and a back flow road opposite to the flow road. The flow surface is crossed On the side of the first module and the side of the second module, and pressed against the side of the first module and the side of the second module, so that the flow surface aligns the side of the flow path of the clamping face and Block the side of the flow path of the aforementioned die lip; The extrusion preventing part prevents the deformation of the liner from being squeezed out between the inner surface of the first module and the inner surface of the second module by allowing the liner to deform toward the side of the backflow road surface. The T-shaped mold as described in item 1 of the scope of patent application, wherein: The aforementioned lateral sealing mechanism includes a pressing member having a pressing surface that abuts and presses against the backflow road surface of the aforementioned pad; The extrusion preventing part is provided on the pressing surface of the pressing member, and is a recess formed by a space accommodating the deformed portion of the gasket. The T-shaped mold as described in item 2 of the scope of patent application, wherein: The recessed portion is a groove portion, and is a back flow road surface formed on the pressing surface of the pressing member. The T-shaped mold as described in item 1 of the scope of patent application, wherein: The aforementioned lateral sealing mechanism includes a pressing member having a pressing surface that abuts and presses against the backflow road surface of the aforementioned pad; The anti-extrusion portion is provided on the back-flow road surface of the pad and is a recess formed by a space that accommodates the deformed portion of the pad. The T-shaped mold according to any one of items 2 to 4 of the scope of patent application, wherein: The aforementioned side sealing mechanism includes: a pair of side plates respectively installed on the side of the first module and the side of the second module; The aforementioned pressing member has: a pressing plate having the aforementioned pressing surface, and a receiving plate locked to the aforementioned pair of side plates; By screwing in the stop screw from the receiving plate, the gasket is pressed across the side surface of the first module and the side surface of the second module via the pressing plate. The T-shaped mold according to any one of items 2 to 4 of the scope of patent application, wherein: The aforementioned side sealing mechanism includes a side plate that is installed across the side surface of the aforementioned first module and the side surface of the aforementioned second module; The side plate is attached to a contact surface that abuts against the side surface of the first module and the side surface of the second module, and has a recess for accommodating the gasket and the pressing member; By screwing in a stop screw from the side plate, the gasket is pressed across the side surface of the first module and the side surface of the second module via the pressing member. A sheet and film manufacturing device, which is characterized by: Equipped with the T-shaped mold described in any one of items 1 to 6 of the scope of patent application. A T-shaped mold that uses multiple manifolds to widen the introduced molten resin in the width direction, merge the widened molten resin in the main flow path, and then eject it in a sheet or film form from the gap between the die lips The T-shaped mold is characterized by: The T-shaped mold body has a first module and a second module facing each other. At least between the inner surface of the first module and the inner surface of the second module facing each other, there is formed: And the main clamping face flow path and die lip flow path through which the expanded molten resin flows, and The side sealing mechanism is installed on the side surface of the T-shaped mold body composed of the side surface of the first module and the side surface of the second module, and connects at least the side of the main clamping surface flow path and the mold Seal the side of the lip flow path; The T-shaped mold body is located in the first module, and is formed with: a first module side manifold and a first module side clamping face flow path; the first module side clamping face flow path is made by The molten resin after the expansion of the first module-side manifold portion is circulated, and the circulating molten resin is merged at the connecting portion of the flow path of the main clamping face portion and the flow path of the mold lip portion; And in the second module, there are formed: a second module side manifold and a second module side clamping face flow path; the second module side clamping face flow path is used by the second module side manifold The molten resin after the tube is widened circulates, and the circulating molten resin is merged at the connection part of the flow path of the main clamping face portion and the flow path of the mold lip portion; The aforementioned side sealing mechanism includes: a gasket and an extrusion prevention part; The gasket is formed in a thin plate shape and has a flow facing the main clamping face flow path, the lip flow path, the first module side clamping face flow path, and the second module side clamping face flow path. The road surface and the back flow road surface on the opposite side to the flow road surface, by making the flow road surface straddle the side surface of the first module and the side surface of the second module, and press against the side surface of the first module. And the side of the second module, the flow path is made to connect the side of the main clamping face flow path, the side of the mold lip part flow path, the side of the first module side clamping face flow path, and the aforementioned Block the side of the flow path of the second module side clamping face; The extrusion preventing part prevents the liner from facing between the inner surface of the first module and the inner surface of the second module and the first module by allowing the liner to deform toward the backflow road side In the side clamping face flow path and the second module side clamping face flow path, at least the inner surface of the first module and the inner surface of the second module are extruded and deformed. As the T-shaped mold described in item 8 of the scope of patent application, in which, At least one of the first module-side clamping face flow path and the second module-side clamping face flow path includes a flat portion that causes the molten resin after the corresponding manifold portion to be widened toward the T-shape A predetermined distance in the direction of circulation of the mold; The aforementioned flat part is equipped with a throttle rod for flow rate adjustment; The side sealing mechanism includes an extrusion preventing portion that prevents the gasket from facing at least the flat portion of the first module side clamping face flow path and the second module side clamping face flow path The deformation of extrusion. Such as the T-shaped mold described in item 8 or 9 of the scope of patent application, wherein, The aforementioned lateral sealing mechanism includes a pressing member having: a pressing surface that is pressed against the backflow road surface of the pad; The extrusion preventing part is provided on the pressing surface of the pressing member, and is a recess formed by a space accommodating the deformed portion of the gasket. As the T-shaped mold described in item 10 of the scope of patent application, The recessed portion is a groove portion, which is a backflow road surface formed on the pressing surface of the pressing member. As the T-shaped mold described in item 8 of the scope of patent application, in which, The aforementioned side sealing mechanism includes a pressing member having: a pressing surface that is pressed against the backflow road surface of the pad; The anti-extrusion portion is provided on the back-flow road surface of the pad and is a recess formed by a space that accommodates the deformed portion of the pad. Such as the T-shaped mold described in item 9 or 12 of the scope of patent application, wherein, The aforementioned side sealing mechanism includes a pair of side plates which are respectively mounted on the side surface of the aforementioned first module and the side surface of the aforementioned second module; The aforementioned pressing member has: a pressing plate having the aforementioned pressing surface, and a receiving plate locked to the aforementioned pair of side plates; By screwing in the stop screw from the receiving plate, the gasket is pressed across the side surface of the first module and the side surface of the second module via the pressing plate. As the T-shaped mold described in item 12 of the scope of patent application, wherein, The aforementioned side sealing mechanism includes a side plate that is installed across the side surface of the first module and the side surface of the second module; The side plate is attached to a contact surface that abuts against the side surface of the first module and the side surface of the second module, and has a recess for accommodating the gasket and the pressing member; By screwing in a stop screw from the side plate, the gasket is pressed across the side surface of the first module and the side surface of the second module via the pressing member. A sheet and film manufacturing device, which is characterized by: Equipped with the T-shaped mold described in any one of items 8 to 14 in the scope of patent application. A gasket for a T-shaped mold is a gasket for a T-shaped mold installed on the side of a T-shaped mold body; the T-shaped mold body has a first module and a second module facing each other, and the first module faces each other. Between the inner surface of the module and the inner surface of the aforementioned second module, there are formed a clamping face flow path and a die lip flow path through which molten resin flows, and the introduced molten resin is expanded in the width direction by the manifold. It is ejected from the gap of the die lip in a sheet or film shape; the side surface of the T-shaped die body includes the side surface of the first module and the side surface of the second module; it is characterized by: The gasket for the T-shaped mold is formed in a thin plate shape, and has a flow surface facing the clamping surface flow path and the mold lip flow path, and a back flow surface opposite to the flow surface. The flow surface crosses the side surface of the first module and the side surface of the second module, and is pressed against the side surface of the first module and the side surface of the second module, so that the flow surface crosses the flow path of the clamping surface The side of the lip and the side of the flow path of the die lip are blocked, and a recess is formed on the back flow road surface. A side sealing mechanism is a side sealing mechanism installed on the side of a T-shaped mold body; the T-shaped mold body has a first module and a second module facing each other on the inner surface of the first module facing each other Between the inner surface of the second module and the inner surface of the second module, there are formed a flow path for the clamping face and a flow path for the lip portion for the flow of molten resin, and the introduced molten resin is widened in the width direction and from the lip gap by the manifold. It is ejected in a sheet or film shape; the side surface of the T-shaped mold body includes the side surface of the first module and the side surface of the second module; it is characterized by: The aforementioned side sealing mechanism includes: a gasket and an extrusion prevention part; The liner is formed in a thin plate shape, and has a flow surface facing the flow path of the clamping surface and the flow path of the mold lip, and a back flow road opposite to the flow road. The flow surface is crossed On the side of the first module and the side of the second module, and pressed against the side of the first module and the side of the second module, so that the flow surface aligns the side of the flow path of the clamping face and Block the side of the flow path of the aforementioned die lip; The extrusion preventing part prevents the deformation of the liner from being squeezed out between the inner surface of the first module and the inner surface of the second module by allowing the liner to deform toward the side of the backflow road surface.

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