JPS6119331A - Head of multilayer extruder - Google Patents

Abstract

PURPOSE:To obtain a multilayer co-extruded article and to facilitate disassembly and cleaning of the titled extruder, by a method wherein a main body of a head is formed of a plurality of divided heads, an extrusion passage is provided between each of abutting surfaces and a rubberlike material is injected through a common die. CONSTITUTION:Movable divided heads 11a, 11b, 11d are locked, a rubberlike material is extruded through extruders each 50 and injected from a common die 7 through a passage 10. When outlets (a), (b), (c) of the three passages 10 communicating with an outlet 7' of the die 7 are arranged as per an illustration, an illustrated multilayer co-extruded article can be obtained. As for disassembly and cleaning after molding, a catch 37 is turned and the heads are opened by releasing connections of the heads 11a, 11b, 11d. When a piston rod 21 is made to retreat, the extrusion passage 10 between the heads 11a, 11b is divided into two along the shaft center, through which the cleaning can be performed easily and a screw of an upper extruder 50 can be pulled out forward through an opening part. Division of the extrusion passage and forward extraction of the screw also of the central and lower extruders 50 are possible similary and the disassembly and cleaning are facilitated.

Description

DETAILED DESCRIPTION OF THE INVENTION (1) Industrial Field of Application This invention relates to a head for a multilayer coextrusion device.

(2) It consists of a conventional technique, and is often composed of a plate portion (as shown in FIG. 7), a surface layer 40', a back layer 41, and a pair of side layers 42.

By the way, as one of the methods for making an extruded product having a three-layer structure as described above, two-layer extrusion molding consisting of a surface layer 40 and a back layer 41 is performed using an extrusion device or the like disclosed in Japanese Patent Publication No. 55-15294. Although there is a method of making a product and adhering a side layer 42' formed by a separate extrusion device to the side m of the molded product, it has the drawback of being very time-consuming to manufacture.

There is also a method of molding using a three-layer extruder.

However, conventional three-layer extruders are very large, often causing unreasonable bending in extruded products, and have the disadvantages that cleaning the passages and extruder requires time and effort.

(3) Problems to be Solved by the Invention Therefore, the technical object of the present invention is to eliminate the above-mentioned drawbacks, to obtain a high-quality multilayer coextruded product, and to facilitate disassembly and cleaning.

formed of a split head, a first movable split head superimposed above and below the fixed split head, and a second movable split head superimposed on at least one of the movable split heads,
The abutting surfaces of each dividing head are inclined toward the die fitting hole, and an extrusion passage communicating with the die fitting hole is provided between the abutting surfaces. An extending extruder connecting plate is provided, and the upper and lower mounting surfaces of the three extruder mounting surfaces provided on the back side of the connecting plate in the vertical direction ■1
are inclined in opposite directions, and an inlet passage communicating with each extrusion passage is formed on the mounting surface, and a second A plate body is formed to fit between the movable one-part head and the connecting plate, and a communication hole communicating with the extrusion passage is provided in the plate body,
The first movable dividing head is rotatably connected to the upper and lower parts of the extruder connecting plate, the second movable dividing head is rotatably connected to the upper part of the first movable dividing head, and a drive device is provided for rotating each movable dividing head, A head tightening mechanism is provided to hold the movable split head in a closed state.

(5) Function The head with the above configuration is used as an extrusion device by attaching an extruder to the extruder mounting surface provided on the connecting plate, and extrudes a rubber-like substance from each extruder to each extrusion passage. This is injected from a common die attached to a die fitting hole to obtain a multilayered molded product.

In addition, when cleaning after molding, the head tightening mechanism is operated to release the movable split head from the fixed split head, and each of the drive devices is actuated to move the second movable split head to the first movable split head. The first movable dividing head is rotated relative to the head, and the first movable dividing head is rotated in a direction away from the fixed dividing head to open the abutting surface, and the screw of the extruder is pulled out from the opening to clean each part. Rub it regularly.

(6) Embodiment As shown in FIGS. 1 to 3, a die fitting hole 2 is formed in the front end surface of the head body 1, and a pair of dies are vertically sandwiched between the die fitting hole 2. For fixing/Linter 3 is placed,
A presser plate 5 having one side inclined is connected to the piston rod 4 of each cylinder 3. Each presser plate is slidable along a guide hole 6 provided on the MiJ surface of the head body 1. Then, actuate the shilling 3 to release the pair of presser plates 5.
When moved in the direction of approaching each other, the tip of each presser foot 5 faces above and below the die fitting hole 2, and the diamond fitted in the die fitting hole 2 is prevented from being pulled out. .

The head main body 1 is divided into four parts in the vertical direction, each divided surface 9 is inclined toward the die fitting hole 2, and an extrusion passage 10 reaching the die fitting hole 21 is provided between each divided surface 9. ing.

The head main body 1 includes a fixed divided head 11C, a first movable divided head 111), 11d superimposed above and below the fixed divided head 11C, and a second movable divided head 11d superimposed on the upper first movable divided head 11b. Consisting of a head Ila, each head 11a, 111), 11C', iid
There is an extrusion passage 10 connected to the die fitting hole 2 between the abutting surfaces of the
is provided.

On the back of the fixed splitting head IIC, an extruder connecting plate 12 is provided that extends to the back of the movable splitting heads 11a, 11b, 11d, and three extruder mounting surfaces 13 are provided on the top and bottom of the back of the 12 connections. It is formed. Each mounting surface 13
are provided with inlet passages 14, each inlet passage 14 communicating with said extrusion passage 10.

On the other hand, a plate body 40 that fits between the connecting plate 12 and the second movable split head 11a is formed on the back of the first movable split head 11b that overlaps the upper side of the fixed split head 11C.
A communicating hole 41 is provided in the plate body 40 to communicate the extrusion passage 10 and the inlet passage 14.

Brackets 15 are formed on the upper and lower parts of the connecting plate 12, and the upper bracket 15 and the second movable split head 11a are connected to each other.
Arms 16 provided on the backs of the first movable dividing heads 11b overlapping therewith are rotatably connected by shafts 17. On the other hand, an arm (16
') are rotatably connected by a shaft (17'), and the piston rod 21 of the cylinder 18, 19, 20 for rotational driving of each movable split head 11a, 11b, lid is connected to each arm 1, 16'. The movable split head 112.11b and lid can be rotated by operating the cylinders 1B and 19.20.

Movable split head 1ia, 11h, 11
In each case, the head clamping is held in the closed state by the action of the mechanism 30. Here, as shown in FIG. 3, the head tightening mechanism is provided with supports on both sides of the fixed split head 11C with upper and lower surfaces inclined in opposite directions so that the width dimension of the tip part is larger than that of the rear end part. A block 31 is provided,
Upper movable split head 11a and lower movable split head 1
Support blocks 31 are provided on both sides of 1d in the closed state.
A tightening block 34 is provided with an inclined surface 33 supported by an inclined surface 32 of The clasp 37, which is attached to the side surface of the extruder connecting plate 12 and rotatably supported toward the side surface of the head body 1 about the connecting shaft 36, has the above-mentioned pair of slanted surfaces. Tightening block 34. ．． 3
The upper and lower surfaces of the recess 38 are formed into an inclined surface 39 facing the inclined surface 35.35 of the tightening block 34.34, and the clasp 37 is fitted into a pair of tightening blocks.

The movable split head 11 a , 11 is fitted on the outside of 34 .
b, i and 1d are kept in their assembled state.

In addition, it is necessary to rotate the clasp 37! A cylinder can be used as the Iil+ device.

The head shown in the top embodiment has the above structure, and as shown in FIG.
Attach Q and form extrusion 4% jj'A.

Now, the movable dividing head 11a, 111), 1
Each extrusion t with its 2% of 1 d closed
When a rubber-like substance is extruded from 450, the rubber-like substance becomes
It passes through the extrusion passage 10 at θI and is injected from the common die 7.

Here, if the arrangement of the three extrusion passages 10 (lower), (b), and (c) communicating with the outlet lower' of the die 7 is as shown in FIG. 6, then as shown in FIG. It is possible to obtain extrudates. Note that the exit (a) is the exit of the extrusion passage 10 provided in the center of the head body 1, and the exit (b)
is the extrusion m j? provided at the bottom of the head body 1? i 1
The outlet Q and the outlet (C) indicate the outlet of the extrusion passage 10 provided at the upper part of the head support 1.

When disassembling and cleaning after molding an extrudate as described in Section 2, the clasp 37 is rotated to remove the movable split heads 11a and 1.
1h and Ild, each of the movable split heads 11a, 11b, and 11d is released.

Now, when the driving cylinder 18 of the 'i'r' 22-movable splitting rod 11a is actuated and its piston rod 21 is moved back, the second movable splitting head 11a rotates upward about the shaft 17. As shown by the dashed line in Figure 3,
The second movable split head 11a can be opened. For this reason, the extrusion passage 10 formed between the second movable dividing head Ila and the first movable dividing head 11b below it.
is divided into two parts along the axis, and the extrusion passage 10 thereof can be easily cleaned, and the screw of the upper extruder 50 can be pulled out forward from the opening of the movable dividing head Iia, 11b.

In addition, the first movable split head 11h and the lid driving cylinders ici and 2o are actuated, respectively, so that the piston rod 2
When retracting 1, the 1st '+iJ moving dividing head 11 b
, i 1d respectively ・II+ 1−/ ,
17' and separates from the fixed dividing head 11c, the extrusion passage 10 formed by the fixed dividing head 11C can be easily cleaned, and the central extruder 50
And the screw of the lower extruder bO can be pulled out in front of the head body.

In the embodiment shown in FIG.
1b and the second movable split head Ila are arranged on the same axis, but as shown in FIG. The arm 16 of the head Ila may be rotatably connected.

Further, a first movable splitting head is arranged above the fixed splitting head l'lC, and a first movable splitting head is arranged below the fixed splitting head IIC. A second movable split head may be provided, and a first movable split head may be provided above and below, respectively, sandwiching the fixed split head. A second movable dividing head may be provided to obtain a four-layer extrudate.

(7) Effects As described above, according to the present invention, the head body is formed of a plurality of divided heads, the abutting surfaces of each head are inclined toward the die fitting hole, and each of the abutting surfaces 1hJ Since extrusion passages reaching the die fitting holes are provided, a multilayered extruded product can be produced by moving a different rubber-like substance through each extrusion passage and injecting it from a common goo set in the die fitting hole. In addition, since the extrusion direction of the extruder attached to the connecting plate of the fixed dividing head and the take-up direction of the molded product injected from the die are the same, the molded product will not be unreasonably bent An extruded product can be obtained.

In addition, a plate body that fits between the connecting plate and the second movable split head is provided on the back of the first movable split head located between the fixed split head and the second movable split head, and a plate body that fits between the connecting plate and the second movable split head is installed. Since the arm of the RAD to the second movable divided head is rotatably connected to the provided arm, and the arm of the first movable divided head is connected to the connecting plate of the fixed divided head, each movable divided head can be rotated. As a result, the abutting surfaces forming the extrusion passage are opened, and the screw of the extruder can be pulled out through the opening of the opening, making it extremely easy to clean the extrusion passage and the extruder.

Furthermore, since an extruder mounting surface is formed in the vertical direction on the back surface of the connecting plate of the defining dividing head, by mounting the extruder on the mounting surface, multiple extruders can be arranged in three dimensions, resulting in a small and compact extrusion device. be able to.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional side view showing an embodiment of the head according to the present invention, FIG. 2 is a front view of the same, FIG. 3 is a side view of the same, and FIG. 4 is an open state of the movable split head of the above. 5 is a plan view showing the connecting part of the movable dividing head, FIG. 6 is a front view showing the arrangement of the exit of the die and the exit of each extrusion passage, and FIG. 7 is a view of the extruded product. A sectional view, FIG. 8 is a sectional view showing another embodiment of the same extruder. 1... Head body, 2... Die fitting hole, 11a...
・Second movable split head, Ilb, 11d...Movable split head, 11C...Fixed split head, 12...Connection plate, 13...Mounting surface, 1B, 19.20...Nylinder,
30... Tightening mechanism, 40... Plate body, 41... Communication hole. Patent Applicant: Nakata Zoki Co., Ltd. Agent: Fumiji Kamata Figure 8 Procedural Amendment (Voluntary) June 20, 1985 Patent Application No. 141001, filed in 1988 2, Title of Invention: Multilayer Extrusion Device Head 3, Amendment Relationship with the evening incident Patent applicant address: 3-1-20 Wakihama-cho, Chuo-ku, Kobe City (Name and title) Naka [Kuchizoki Co., Ltd. 5゜Showa de Io Monthly (Shipping date)
6. Number of inventions increased by amendment Contents of amendment 1. The scope of claims of the claimed invention will be amended as shown in the attached sheet. 2. On page 4 of the specification, from the 2nd line to the 9th line, ``Provide a communicating hole in the connecting plate'' is corrected as follows. Note: The first movable split head located between the second movable split head and the fixed split head is provided with a plate interposed between the second movable split head and the connecting plate; The connecting plate has an inlet passage communicating with the extrusion passage between the first movable dividing head and the second movable dividing head through the hole formed in the plate O, and an extrusion passage between the fixed dividing head and the first movable dividing head ( 3. Correct "upper movable split head 11a" on page 8, line 8 of the same page to "second movable split head 11a". 4, page 14, line 2 of the same page. The "movable split head" in the third line is corrected to the "first movable split head". Claims: A head body having a die fitting hole on the tip surface is a fixed split head, and the fixed split head is a first movable divided head that overlaps vertically and a second movable divided head that overlaps at least one of the first movable divided heads, and an abutment surface of each divided head is inclined toward the die fitting hole;
In addition, an extrusion passage communicating with the die fitting hole is provided between the abutting surfaces, and two movable split heads extending toward the back side of each movable split head are provided on the upper part of the plate of the first movable split head in the fixed part 1 and 11 heads. A head of a multi-layer extrusion device, which is rotatably connected to each other, is provided with a drive device for rotating each movable dividing head, and is provided with a head tightening mechanism for holding the movable dividing head in a closed state.

Claims (1)

[Claims] A head body having a die fitting hole on the tip surface is composed of a fixed split head, a first movable split head superimposed above and below the fixed split head, and a second movable split head superimposed on at least one of the movable split heads. forming an abutting surface of each split head toward the die fitting hole, and providing an extrusion passage communicating with the die fitting hole between the abutting surfaces;
An extruder connecting plate extending to the back side of the movable dividing head is provided on the back of the fixed dividing head, and the upper and lower mounting surfaces of the three extruder mounting surfaces provided in the vertical direction on the back of the connecting plate are tilted in opposite directions, In addition, an inlet passage communicating with each extrusion passage is formed on the mounting surface, and an inlet passage is formed between the second movable dividing head and the connecting plate on the back of the first movable dividing head located between the second movable dividing head and the fixed dividing head. A plate body is formed into which the plate body is fitted, a communication hole communicating with the extrusion passage is provided in the plate body, the first movable dividing head is placed above and below the extruder connecting plate, and the second movable dividing head is placed above the first movable dividing head. A head of a multi-layer extrusion device, which is rotatably connected to each other, is provided with a drive device for rotating each movable split head, and is provided with a head tightening mechanism for holding the movable split head in a closed state.