JPH0642147U - T-die with deckle - Google Patents

Abstract

(57) [Summary] [Purpose] The durability of the T-die body can be improved and the quality of molded products and laminated products is improved. A manifold 13 is formed by a pair of T-die bodies 11 and 12, and a pair of deckles 33 are slidably disposed in the manifold 13. The T-die body 1
A plating layer is formed on the contact portions of the resin 1 and 12 with the resin, and the deckle 33 is formed of PTFE, a polyimide resin, a composite material of polyimide and graphite, and polyimide and PT.
It is molded by one of the composite materials of FE and graphite.
Even if the deckle 33 slides on the T-die bodies 11 and 12,
It is possible to prevent damage to the plating layer without causing wear between the plating layer and the deckle 33 or adhesion between the two. Therefore, not only the durability of the T-die bodies 11 and 12 can be improved, but also the quality of molded products and laminated products can be improved.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a T-die with a deckle.

[0002]

[Prior art]

 Conventionally, in an extrusion apparatus for extruding a film, a sheet, etc., an extrusion molding die, that is, a T-die is connected to the tip of the extruder, and the resin melted in the extruder is passed through the T-die. It is extruded to form a molded product or laminated. In addition, a deckle is provided to change the width of a molded product or a laminated product in one T-die.

FIG. 2 is a cross-sectional view of a conventional T-die with a deckle, and FIG. 3 is a vertical cross-sectional view of a conventional T-die with a deckle. In the figure, 11 and 12 are a pair of T-die main bodies that constitute a T-die with deckle. The T-die bodies 11 and 12 have a length set so as to correspond to the width of a molded product or a laminated product, and are arranged to face each other as shown in the drawing. A manifold 13 for receiving the molten resin from the machine is formed between the two. Reference numeral 14 is a slit for pushing out the resin in the manifold 13.

The T-die bodies 11 and 12 have lands 11a and 12a which become thinner toward the slit 14, and an adjusting lip 15 is attached to the land 11a and a fixing lip 16 is attached to the land 12a. The fixing lip 16 is fixed to the land 12a, while the adjusting lip 15 is attached so as to be movable with respect to the land 11a, and the adjusting bolt 17 is rotated. The adjustment lip 15 can be slid to change the gap of the slit 14. The fixed lip 16 is attached to the land 12a, but the gap of the slit 14 can be changed by using a pair of adjusting lips instead of the fixing lip 16.

The manifold 13 is formed by a main manifold portion 13 a that communicates with a resin injection port 19 that receives a resin from an extruder, and a lower portion that communicates with the main manifold portion 13 a and that extends downward. It consists of a communicating pressure manifold portion 13b. Reference numeral 20 is a heater fixed to the side walls of the T-die bodies 11 and 12 for heating the resin flowing through the resin injection port 19 and the manifold 13.

In the deckle with a deckle having the above-described structure, the resin melted by the extruder is sent to the manifold 13 through the resin injection port 19 and is moved in the manifold 13 in the width direction of the molded product or the laminated product. It spreads and is pushed out from the slit 14. By the way, although the base material of the T-die bodies 11 and 12 is made of steel, when the molten high-temperature resin flows along the surface of the T-die bodies 11 and 12, not only does it wear but also the resin May be corroded by. Therefore, the contact portions of the T-die bodies 11 and 12 with the resin, such as the inner peripheral surface a of the manifold 13, the surface b 1 of the slit 14 and the peripheral surface c of the slit 14, are made of hard chrome plating having high workability. A plating treatment is applied to increase hardness, improve resin flowability, and improve wear resistance and corrosion resistance. In this case, the plating treatment is simultaneously performed between the land 11a and the adjustment lip 15 and between the land 12a and the fixed lip 16.

Reference numeral 21 is a pair of deckles arranged in the manifold 13 so as to face each other. The deckle 21 has a shape capable of sliding airtightly in the manifold 13 in order to change the width of a molded product or a laminated product. Then, the resin supplied from the resin injection port 19 spreads into the resin space between the pair of deckles 21 and is pushed out from the slit 14.

The deckle 21 is fixed to a connecting shaft 23 that penetrates through the side plate 22 of the T-die with a deckle, and the connecting shaft 23 moves the deckle 21 left and right as shown by an arrow. It can be done. In order to slide the deckle 21 in the manifold 13, a clearance is formed between the deckle 21 and the T-die bodies 11 and 12. Therefore, the resin supplied into the manifold 13 in a melted and pressurized state leaks to the left and right outside of the deckle 21 through the clearance between the deckle 21 and the T-die bodies 11 and 12. In that case, the leaked resin is sealed by the rod 25, so that the leaked resin is prevented from coming out from the slit 14.

[0009]

[Problems to be solved by the device]

 However, in the conventional T-die with deckle, since metal such as aluminum and bronze is used as the material of the deckle 21, it is possible to change the width of the molded product or the laminated processed product and to clean the inside of the T-die with deckle. When the deckle 21 is moved to the left or right, for example, when abrasion occurs between the plating layer that covers the T-die bodies 11 and 12 and the deckle 21, or adhesion occurs between the two. As a result, the plating layer is damaged.

When such wear and damage progress, they eventually reach the base materials of the T-die bodies 11 and 12. In such a state, if a resin with strong corrosiveness such as ethylene vinyl alcohol (EVA) is extrusion-molded, not only will the resin stay in the damaged part, but it will not only corrode the base metal significantly, but also The quality of products and laminated products will be significantly reduced.

Particularly, in the case where the T-die bodies 11 and 12 are plated with hard chrome, there are many microcracks in the surface layer of the plating layer, so that abrasion and damage are likely to occur. The present invention solves the problems of the conventional T-die with deckle and improves the durability of the main body of the T-die, and also improves the quality of molded products and laminated products. Intended to provide the die.

[0012]

Therefore, in the T-die with deckle of the present invention, a manifold is formed by a pair of T-die bodies, and a lip is disposed at the tip of the T-die body, and the lip is made of resin. To form a slit for extruding. A pair of deckles are slidably disposed in the manifold.

Then, a plating layer is formed on a portion of the T-die body that contacts the resin, and the deckle is formed of PTFE, a polyimide resin, a composite material of polyimide and graphite, or a composite material of polyimide, PTFE and graphite. Mold by either one.

[0014]

[Action]

 According to the present invention, as described above, the manifold is formed by the pair of T-die bodies, and the lip is disposed at the tip of the T-die body, and the lip forms the slit for pushing out the resin. The resin supplied from the extruder is sent to the slit through the manifold and extruded from the slit.

A pair of deckles is slidably arranged in the manifold. By sliding the deckle, it is possible to change the width of the molded product or the laminated product and to remove the oxide adhering to the inside of the manifold. Then, a plating layer is formed on a portion of the T-die body that contacts the resin, and the deckle is formed of any one of PTFE, a polyimide resin, a composite material of polyimide and graphite, and a composite material of polyimide, PTFE and graphite. Mold by one.

Even when the deckle slides on the T-die body, the plating layer is damaged without causing wear between the plating layer and the deckle or adhesion between the deckle and the deckle. Can be prevented.

[0017]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a transverse sectional view of a T-die with a deckle showing an embodiment of the present invention, and FIG. 4 is a vertical sectional view of a T-die with a deckle showing an embodiment of the present invention. In the figure, 11 and 12 are a pair of T-die main bodies that constitute a T-die with deckle. The T-die bodies 11 and 12 have a length set so as to correspond to the width of a molded product or a laminated product, and are arranged to face each other as shown in the drawing. A manifold 13 for receiving the molten resin from the machine is formed between the two. Reference numeral 14 is a slit for pushing out the resin in the manifold 13.

The T-die bodies 11 and 12 have lands 11a and 12a that become thinner toward the slit 14, and an adjusting lip 15 is attached to the land 11a and a fixing lip 16 is attached to the land 12a. The fixing lip 16 is fixed to the land 12a, while the adjusting lip 15 is attached so as to be movable with respect to the land 11a, and the adjusting bolt 17 is rotated. The adjustment lip 15 can be slid to change the gap of the slit 14. In the present embodiment, the fixed lip 16 is attached to the land 12a, but the fixed lip 16 is replaced with an adjusting lip, and the gap of the slit 14 is changed by a pair of adjusting lips. be able to.

The manifold 13 is formed between the mating surfaces of the T-die bodies 11 and 12, and has a main manifold portion 13 a that communicates with a resin injection port 19 that receives a resin from an extruder, and a main manifold portion 13 a that communicates with the main manifold portion 13 a. The pressure manifold portion 13b is formed so as to extend downward and communicate with the slit 14. The main manifold portion 13a has a substantially circular cross section, and the pressure manifold portion 13b has a narrow groove cross section. Reference numeral 20 is a heater fixed to the side walls of the T-die bodies 11 and 12 for heating the resin flowing through the resin injection port 19 and the manifold 13.

In the deckle with a deckle having the above-described configuration, the resin melted by the extruder is sent to the manifold 13 through the resin injection port 19 and is moved in the manifold 13 in the width direction of the molded product or the laminated product. It spreads and is pushed out from the slit 14. By the way, although the base material of the T-die bodies 11 and 12 is made of steel, when the molten high-temperature resin flows along the surface of the T-die bodies 11 and 12, not only does it wear but also the resin May be corroded by. Therefore, the contact portions of the T-die bodies 11 and 12 with the resin, such as the inner peripheral surface a of the manifold 13, the surface b 1 of the slit 14 and the peripheral surface c of the slit 14, are made of hard chrome plating having high workability. A plating treatment is applied to increase hardness, improve resin flowability, and improve wear resistance and corrosion resistance. In this case, the gap between the lands 11a and the adjusting lip 15 and between the lands 12a and the fixed lip 16 are simultaneously plated to increase the accuracy of the gap of the slits 14 described above.

Reference numeral 33 denotes a pair of deckles arranged in the manifold 13 so as to face each other. The deckle 33 has a shape that allows it to slide in an airtight manner in the manifold 13 in order to change the width of a molded product or a laminated product. The resin supplied from the resin inlet 19 spreads into the resin space between the pair of deckles 33 and is pushed out from the slit 14.

The deckle 33 is fixed to a connecting shaft 23 that penetrates through the side plate 22 of the T-die with the deckle, and moves the deckle 33 left and right by the connecting shaft 23 as shown by an arrow. It can be done. Therefore, the sliding screw 24 is arranged in the connecting shaft 23 by screwing. The sliding screw 24 is restricted in its axial movement by a support member 35 and is rotatably supported. The sliding screw 24 is connected to a handle 36, and by rotating the handle 36, the sliding screw 24 is rotated and the connecting shaft 23 screwed to the sliding screw 24 is moved to the left and right. be able to.

A clearance is formed between the deckle 33 and the T-die bodies 11 and 12 for sliding the deckle 33 in the manifold 13. Therefore, the resin supplied into the manifold 13 in a molten and pressurized state leaks to the left and right outside of the deckle 33 through the clearance between the deckle 33 and the T-die bodies 11 and 12. In that case, since the leaked resin is sealed by the rod 25, it is prevented from going out from the slit 14.

When the width of the molded product or the laminated product is changed, or when the oxide or the like attached to the T-die bodies 11 and 12 is removed, when the handle 36 is rotated to the left or right, the sliding is accompanied by it. The moving screw 24 rotates, and the deckle 33 moves left and right with respect to the T-die bodies 11 and 12. Here, the deckle 33 is used as an engineering plastic, and is excellent in low wear resistance, creep resistance, lubrication characteristics and heat resistance, PTFE, polyimide resin, a composite material of polyimide and graphite, or polyimide, PTFE and graphite. It is molded from a composite material. The graphite increases mechanical strength and rigidity by adding it to polyimide or the like.

Therefore, even if the deckle 33 slides on the T-die bodies 11 and 12, neither wear nor adhesion between the plating layer and the deckle 33 occurs. It is possible to prevent the plating layer from being damaged. Further, since the deckle 33 is molded from engineering plastic, it can be manufactured by injection molding. In that case, once a mold corresponding to the shape is made, mass production can be performed in a short time, and the time and cost for manufacturing the deckle 33 can be significantly reduced.

It should be noted that the present invention is not limited to the above-described embodiments, but can be variously modified within the scope of the present invention, and these are not excluded from the scope of the present invention.

[0027]

[Effect of device]

 As described in detail above, according to the present invention, a manifold is formed by a pair of T-die bodies, and a pair of deckles is slidably disposed in the manifold. A plating layer is formed on the portion of the T-die body that contacts the resin, and the deckle is made of PTFE, a polyimide resin, a polyimide-graphite composite material, or a polyimide-PTFE composite-graphite composite material. Mold by.

Even when the deckle slides on the T-die body, the plating layer is damaged without causing wear between the plating layer and the deckle or adhesion between the deckle and the deckle. Can be prevented. Therefore, not only the durability of the T-die main body can be improved, but also the quality of the molded product or the laminated product can be improved.

Further, since the deckle can be manufactured by injection molding, mass production can be performed in a short time, and the time and cost for manufacturing the deckle can be significantly reduced.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a T-die with a deckle showing an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a conventional T-die with deckle.

FIG. 3 is a vertical sectional view of a conventional T-die with a deckle.

FIG. 4 is a vertical sectional view of a T-die with a deckle showing an embodiment of the present invention.

[Explanation of symbols]

 11, 12 T-die body 13 Manifold 14 Slit 15 Adjustment lip 16 Fixed lip 33 Dickel

Claims (1)

[Scope of utility model registration request] 1. A pair of T-die bodies forming a manifold; (b) Lips provided at the tip of the T-die bodies to form slits for pushing out resin; (c) The manifold. A pair of deckles that slide inside, (d) a plating layer is formed on the T-die body in contact with the resin, and (e) the deckles are made of PTFE, polyimide resin,
Composite material of polyimide and graphite, and polyimide and PTFE
T-die with deckle, characterized by being molded by one of a composite material of graphite and graphite.