JPH066325B2 - Composite adapter for extrusion - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a composite die adapter applied to a multilayer film manufacturing apparatus, a multilayer sheet manufacturing apparatus, a multilayer inflation film manufacturing apparatus, and the like.

(Prior Art) FIG. 8, FIG. 9 and FIG. 10 show an example of a conventional composite die adapter. In the figure, reference numeral 61 is a known composite T-die, and the resin supplied from each of the conduits 62 ', 63', 64 'is spread in the width direction and then laminated, and the slit 6 is used to open the outlet 6
Extrude from No. 9.

In addition, 62, 63, 64 are conduits, and each extruder 65, 66,
It is for introducing the molten resin extruded from 67 into the composite die 61, one side to the front of the extruder and the other end to the composite die 61 via the conduits 62 ', 63' and 64 'through bolts and the like ( (Not shown). In addition, 65,6
Reference numerals 6 and 67 denote known extruders for kneading and extruding a resin to be a sheet (or film).

The molten resins extruded from the extruders 65, 66 and 67 respectively are introduced into the die 61 through conduits 62 and 62 ', conduits 63 and 63' and conduits 64 and 64 ', respectively. Then, the molten resin supplied to the die 61 from the flow path 62a of the conduit 62 'passes through the in-die introduction path 62b and the die manifold 62.
It enters into c, is expanded in the width direction, and is introduced into the slit 62d.

Also, the flow path 63a of the conduit 63 'and the flow path 64 of the conduit 64'.
The molten resin introduced from the a into the die 61 passes through the in-die introducing passages 63b and 64b, respectively, and the die manifold 63
c, 64c, spread in the width direction and slit 63
d, 64d. Slits 62d, 63d, 6
The molten resin introduced into 4d is the common slit 68 in the die.
At the same time, the layers are stacked, discharged from the die outlet 69, and passed through the cooling roll 70 to be molded.

As described above, the resin extruded from each extruder is supplied to a certain position to have a certain layer structure, and for example, when it is desired to reverse the front and rear layers (for example, the resin on the side that contacts the cooling roll of the sheet forming machine) (When changing the resin on the non-contact side)
Replaces the conduit 63 with the conduit 64 so that the resin extruded from the extruder 66 flows into the flow channel 64b and the resin extruded from the extruder 67 flows into the flow channel 63b. It was necessary to change the resin raw material of No. 1 and the resin raw material of the extruder 67.

(Problems to be solved by the invention) Extruders have limited types of raw materials for their performance.
Further, since the extrusion capacity is also limited, it is difficult to change the layer structure such as inversion of the front and rear layers in the conventional structure. Further, in the case of molding a two-layer or one-layer sheet (or film) with a conventional three-layer structure, the molten resin flows backward and stays in other channels in the die, and the stayed resin However, there is a problem in that it is thermally deteriorated and flows out into the product sheet (or film) to produce a defective sheet (or film). The present invention has been proposed to solve these problems.

(Means for Solving the Problems) For this reason, the present invention provides a conduit for guiding the melts supplied from three or more extruders, and a plurality of streams for laminating and forming the melts in the width direction. A flow channel distribution plate is formed between the upper portion of the composite die having a channel and a flow channel capable of communicating the melt supplied from each of the conduits via an adapter block with an arbitrary flow channel of the complex die. The flow channel distribution plate is detachably attached to the upper outer surface of the adapter block by means of bolts, which serves as a means for solving the problem.

(Function) The resin flowing in from the resin receiving port of the adapter block
After passing through the flow path, it passes through the flow path in the center of the connection block and flows into the flow path for the center layer of the die. Further, the resin that has flowed in from another resin receiving port of the adapter block enters the flow channel of the flow channel distribution plate from the flow channel different from the above, and then flows into the die manifold of the die through another flow channel. On the other hand, the resin that has flowed in from the other resin receiving port of the adapter block enters the flow channel of the flow channel distribution plate from another flow channel, and then flows into another die manifold of the die via another flow channel. After that, it is uniformly spread in the width direction in the die, laminated into three layers, and extruded as a sheet (or film).

Next, when it is desired to change the layer structure of the composite sheet (or film), it is possible by replacing the flow channel distribution plate with a desired one. That is, in this case, it is necessary to remove the flow channel distribution plate on the adapter block, but in this case, loosen the bolts to remove the flow channel distribution plate from the adapter block, and then place the desired flow channel distribution plate on the adapter block. This can be achieved by mounting it on the bolt.

(Embodiment) The present invention will be described below with reference to embodiments of the drawings. Figs. 1 to 7 show embodiments of the present invention. Now, an example of a three-kind three-layer sheet (or film) using three extruders 65, 66, 67 and a three-layer die 61 will be shown here. Three
Numerals 4 and 5 are conduits for introducing the molten resins a, b and c extruded from the extruders 65, 66 and 67 into the composite die 61, one side being the front side of the extruder and the other end being an adapter. It is fastened to the block 11 with bolts or the like (not shown).

Further, 10a to 10h are flow channel distribution plates, and first, the flow channel distribution plate 1
0a is attached to the upper surface of the adapter block 11, and the resin supply ports 21b, 22c, 2 from the adapter block 11 are attached.
3c, and the resin flow paths 21f, 2 of the adapter block 11
Channels 21d, 22e, 23 connecting 2g, 23g respectively
e (Fig. 7 (A)). Also, the flow channel distribution plate 10b
[FIG. 7 (B)] shows a case where a resin flow path 23i is formed in place of the resin flow path 22e. The flow channel distribution plate 10c [FIG. 7 (C)] shows a case where a resin flow channel 22i is formed instead of the resin flow channel 23e. Channel distribution plate 10d [7th
(D)] shows a case where a resin flow passage 21h is formed in place of the resin flow passage 22e of the flow passage distribution plate 10c. The flow channel distribution plate 10e [FIG. 7 (E)] shows a case where a resin flow channel 21i is formed in place of the resin flow channel 23e of the flow channel distribution plate 10b. The channel distribution plate 10f [Fig. 7 (F)] is the channel distribution plate 10f.
The case where a resin flow channel 21h is formed instead of the resin flow channel 22e of a is shown. The flow channel distribution plate 10g [FIG. 7 (G)] shows a case where a resin flow channel 21i is formed in place of the resin flow channel 23e of the flow channel distribution plate 10a. Channel distribution plate 10h [Fig. 7 (H)]
Shows the case where resin flow paths 21h and 21i are formed in place of the resin flow paths 22e and 23e of the flow path distribution plate 10a.

The flow channel distribution plate 10 is removed by removing the mounting bolts 15 and lifting the manifold block 12 and the flow channel distribution plate 10. The flow channel distribution plate 10 is mounted at a predetermined position (for positioning) on the upper surface of the adapter block 11. Pin 1
7), and the mounting bolt 1
5 may be firmly fastened to the adapter block 11. The flow channel distribution plates 10a to 10h are appropriately replaced and used as needed.

The adapter block 11 is the main body of the adapter, and has resin receiving ports 21a, 22a, 23a from the conduits 3, 4, 5.
The resin receiving port 21a has a flow path 21b to the flow channel 21c of the flow channel distribution plate 10a, and the resin receiving port 22a has flow channels 22b and 22c to the flow channel 22 of the flow channel distribution plate 10a.
The resin receiving port 23a is connected to the flow path 23d of the flow path distribution plate 10a via the flow paths 23b and 23c. Further, the flow passage 21f connected to the flow passages 21d and 21e of the flow passage distribution plate 10a, and the flow passage 2 connected to the flow passage 22f of the distribution plate 10a.
2 g, the flow path 23 connected to the flow path 23 f of the distribution plate 10 a
g respectively. The manifold block 12 is fixed to the flow channel distribution plate 10a with bolts 16 to form a flow channel 21d.

13 is a connection block, which is an adapter block 11 and a die 6
The flow passage 21f connects the die manifold 62c, the flow passage 22g connects the flow passage 22g and the die manifold 63c, and the flow passage 23f.
g and the die manifold 64c are connected to each other, and the flow path 23h connects the adapter block 11 and the bolt 1 with the bolt 20.
They are fixed to the three-layer die 61 by 9, respectively. 14a ~
A heater 14e heats the flow path distribution plate 10, the adapter block 11, and the connection block 13, and the temperature of each is controlled.

Next, the operation will be described. The molten resin reaches the adapter 11 from each extruder 65, 66, 67 through each conduit 3, 4, 5.

First, when the flow channel distribution plate 10a is used [FIG.
(A)) and FIG. 6 (A)], the resin a flowing from the resin receiving port 21a of the adapter block 11 will be described.
Passes through the flow passages 21b, 21c, 21d, 21e, and 21f, passes through the flow passage 21g at the center of the connection block 13, and the die 6
1 into the central layer flow channel 62c.

Further, the resin b that has flowed in from another resin receiving port 22a of the adapter block 11 enters the flow passage 22d of the flow passage distribution plate 10a from the flow passages 22b and 22c, and further the flow passages 22e and 22f.
Through the flow path 22g of the adapter block 11 and the flow path 22h of the connecting pipe into the die manifold 63c of the die 61. On the other hand, the other resin receiving port 2 of the adapter block 11
The resin flowing in from 3a enters the flow path 23d of the flow path distribution plate 10a from the flow paths 23b and 23c, and further flows into the flow paths 23e and 2e.
After passing through 3f, it flows into the die manifold 64c of the die 61 from the flow passage 23g of the adapter block 11 and the flow passage 23h of the connecting pipe.

Thereafter, as is well known, it is uniformly spread in the width direction in the die 61, laminated into three layers, and extruded as a sheet (or film).

In addition, when you want to change the layer structure, please refer to FIG.
As shown in (G), (D), (H), etc., the flow passage distribution plate 10g (the resin from the extruder 65 is made to flow into the flow passages 62c and 64c of the die 61 at the same time) in which the connection between the receiving port and the supply port is changed. The resin from the extruder 66 is used as a substantially single layer, and the resin from the extruder 66 is used as the flow path 6
Flow into 3c. After that, they are laminated in the die 61 and extruded as a substantially two-layer sheet (or film)),
10d (two layers in the opposite direction to 10g), 10h (extruder 6
The resin from 6, 67 is made blind, and the resin from the extruder 65 is simultaneously flowed into all the flow paths 62c, 63c, 64c of the die 61 and replaced with a substantially single-layer sheet (or film). For example, the layer structure as shown in FIGS. 6 (G) (D) (H) can be formed arbitrarily. In this case, in order to remove the flow channel distribution plate 10a shown in FIG. 4, first loosen the bolt 15 and remove the flow channel distribution plate 10a and the manifold block 12 from the adapter block 11 as they are. If necessary, bolt
16 is loosened to separate the manifold block 12 and the flow channel distribution plate 10a, and then the desired distribution plate is taken out from the flow channel distribution plates 10b to 10h, integrated with the manifold block 12 and the bolts 16 and bolts 15 to the adapter block 11. Fixed by. As described above, in the present invention, the flow channel distribution plates 10a to 10h may be exchanged, and there is no need to change the conduits or change the processing raw material of the extruder.

In the above embodiments, the case where three extruders and the number of laminated layers are three is shown, but an adapter block and a flow distribution plate may be prepared according to the number of extruders and the number of laminated layers.

(Effects of the Invention) Since the present invention is configured as described in detail above,
It can meet the recent demands for multi-layered sheets and films and diversified layer configurations. Further, the effect of the present invention is great especially in a factory for producing a wide variety of products in small quantities. Furthermore, according to the present invention, it is possible to form a desired layer structure without changing the processing raw material of the extruder or changing the conduits. [The desired number of layers and the desired resin can be used as a roll surface (shining surface). In addition, the structure around the adapter becomes simple and the workability is improved (especially, the effect is great when the number of laminated layers exceeds three layers). Further, according to the present invention, since the flow channel distribution plate is independently attached to the uppermost portion of the composite die by the bolts, the flow channel distribution plate can be replaced with a desired one simply by loosening and removing the bolts. The layer structure of the composite sheet (or film) can be arbitrarily changed. In addition, this replacement work can be done simply by removing the bolt and mounting it, and also has many excellent effects such as easy cleaning of the mounting surface and shortening of the working time.

[Brief description of drawings]

FIG. 1 is a plan view of an extrusion adapter assembly showing an embodiment of the present invention, FIG. 2 is a side view of the extrusion adapter assembly, FIG. 3 is a sectional view taken along line III-III in FIG. 1, and FIG. IV-IV sectional drawing in FIG. 3, FIG. 5 is a V arrow view in FIG. 3,
FIG. 6 is a layer configuration diagram when the flow channel distribution plate of FIG. 7 is used, and FIG. 7 is a sectional view taken along line VII-VII in FIG. 3, showing various structural examples of the flow channel shape of the flow channel distribution plate. A plan view, FIG. 8 is a plan view of a conventional composite adapter, FIG. 9 is a side view of the same, and FIG. 10 is a sectional view taken along line X-X in FIG. Description of the main parts of the figure 3,4,5 …… Conduit 10a to 10h …… Flow distribution plate 11 …… Adapter block 12 …… Manifold block 61 …… Complex die 62c, 63c, 64c …… Die manifold 65,66 , 67 …… Extruder

Claims (1)

[Claims] 1. Between a conduit for guiding melts supplied from three or more extruders, and an upper part of a composite die having a plurality of channels for laminating and forming the melts in a width direction and then laminating. , A channel distribution plate having a channel capable of communicating the melt supplied from each of the conduits through the adapter block with an arbitrary channel of the composite die is provided, and the channel distribution plate is provided in the adapter block. A composite adapter for extrusion molding, which is detachably attached to the outer surface of the upper part with a bolt.